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color-computed-relative-color.html
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color-computed-relative-color.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>CSS Color Level 5: Computation of colors using relative color syntax</title>
<link rel="author" title="Sam Weinig" href="mailto:weinig@apple.com">
<link rel="help" href="https://drafts.csswg.org/css-color-5/#relative-colors">
<link rel="help" href="https://drafts.csswg.org/css-color-5/#serial-relative-color">
<meta name="assert" content="computed value of color using relative color syntax matches expected values">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<script src="/css/support/color-testcommon.js"></script>
<style>
html {
--bg-color: blue;
--color: green;
--accent: lightseagreen;
--mycolor: orchid;
--mygray: lch(from var(--mycolor) l 0 h);
}
</style>
</head>
<body>
<div id="target"></div>
<script>
// rgb(from ...)
// Testing no modifications.
fuzzy_test_computed_color(`rgb(from rebeccapurple r g b)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g b / alpha)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g b / alpha)`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from hsl(120deg 20% 50% / .5) r g b / alpha)`, `color(srgb 0.4 0.6 0.4 / 0.5)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`rgb(from rgb(from rebeccapurple r g b) r g b)`, `color(srgb 0.4 0.2 0.6)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`rgb(from rebeccapurple 0 0 0)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple 0 0 0 / 0)`, `color(srgb 0 0 0 / 0)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple 0 g b / alpha)`, `color(srgb 0 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r 0 b / alpha)`, `color(srgb 0.4 0 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g 0 / alpha)`, `color(srgb 0.4 0.2 0)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g b / 0)`, `color(srgb 0.4 0.2 0.6 / 0)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) 0 g b / alpha)`, `color(srgb 0 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r 0 b / alpha)`, `color(srgb 0.2 0 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g 0 / alpha)`, `color(srgb 0.2 0.4 0 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g b / 0)`, `color(srgb 0.2 0.4 0.6 / 0)`);
// Testing replacement with a number.
fuzzy_test_computed_color(`rgb(from rebeccapurple 25 g b / alpha)`, `color(srgb 0.098 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r 25 b / alpha)`, `color(srgb 0.4 0.098 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g 25 / alpha)`, `color(srgb 0.4 0.2 0.098)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g b / .25)`, `color(srgb 0.4 0.2 0.6 / 0.25)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) 25 g b / alpha)`, `color(srgb 0.098 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r 25 b / alpha)`, `color(srgb 0.2 0.098 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g 25 / alpha)`, `color(srgb 0.2 0.4 0.098 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g b / .20)`, `color(srgb 0.2 0.4 0.6 / 0.2)`);
// Testing replacement with a percentage.
fuzzy_test_computed_color(`rgb(from rebeccapurple 20% g b / alpha)`, `color(srgb 0.2 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r 20% b / alpha)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g 20% / alpha)`, `color(srgb 0.4 0.2 0.2)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g b / 20%)`, `color(srgb 0.4 0.2 0.6 / 0.2)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) 20% g b / alpha)`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r 20% b / alpha)`, `color(srgb 0.2 0.2 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g 20% / alpha)`, `color(srgb 0.2 0.4 0.2 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g b / 20%)`, `color(srgb 0.2 0.4 0.6 / 0.2)`);
// Testing replacement with a number for r, g, b but percent for alpha.
fuzzy_test_computed_color(`rgb(from rebeccapurple 25 g b / 25%)`, `color(srgb 0.098 0.2 0.6 / 0.25)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r 25 b / 25%)`, `color(srgb 0.4 0.098 0.6 / 0.25)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g 25 / 25%)`, `color(srgb 0.4 0.2 0.098 / 0.25)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) 25 g b / 25%)`, `color(srgb 0.098 0.4 0.6 / 0.25)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r 25 b / 25%)`, `color(srgb 0.2 0.098 0.6 / 0.25)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r g 25 / 25%)`, `color(srgb 0.2 0.4 0.098 / 0.25)`);
// Testing permutation.
fuzzy_test_computed_color(`rgb(from rebeccapurple g b r)`, `color(srgb 0.2 0.6 0.4)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple b alpha r / g)`, `color(srgb 0.6 ${1/255} 0.4)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r r r / r)`, `color(srgb 0.4 0.4 0.4)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple alpha alpha alpha / alpha)`, `color(srgb ${1/255} ${1/255} ${1/255})`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) g b r)`, `color(srgb 0.4 0.6 0.2 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) b alpha r / g)`, `color(srgb 0.6 ${0.8/255} 0.2)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r r r / r)`, `color(srgb 0.2 0.2 0.2)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) alpha alpha alpha / alpha)`, `color(srgb ${0.8/255} ${0.8/255} ${0.8/255} / 0.8)`);
// Testing mixes of number and percentage. (These would not be allowed in the non-relative syntax).
fuzzy_test_computed_color(`rgb(from rebeccapurple r 20% 10)`, `color(srgb 0.4 0.2 0.0392)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r 10 20%)`, `color(srgb 0.4 0.0392 0.2)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple 0% 10 10)`, `color(srgb 0 0.0392 0.0392)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r 20% 10)`, `color(srgb 0.2 0.2 0.0392 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) r 10 20%)`, `color(srgb 0.2 0.0392 0.2 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) 0% 10 10)`, `color(srgb 0 0.0392 0.0392 / 0.8)`);
// r g b
// 102 51 153
// 40% 20% 60%
// Testing with calc().
fuzzy_test_computed_color(`rgb(from rebeccapurple calc(r) calc(g) calc(b))`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r calc(g * 2) 10)`, `color(srgb 0.4 0.4 0.0392)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple b calc(r * .5) 10)`, `color(srgb 0.6 0.2 0.0392)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r calc(g * .5 + g * .5) 10)`, `color(srgb 0.4 0.2 0.0392)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r calc(b * .5 - g * .5) 10)`, `color(srgb 0.4 0.2 0.0392)`);
fuzzy_test_computed_color(`rgb(from rgb(20%, 40%, 60%, 80%) calc(r) calc(g) calc(b) / calc(alpha))`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(100 110 120 / 0.8) calc(r + 1) calc(g + 1) calc(b + 1) / calc(alpha + 0.01))`, `color(srgb 0.396 0.435 0.474 / 0.81)`); // rgb(101 111 121)
fuzzy_test_computed_color(`rgb(from rebeccapurple calc((r / 255) * 100%) calc((g / 255) * 100%) calc((b / 255) * 100%) / calc(alpha * 100%))`, `color(srgb 0.4 0.2 0.6)`);
// Testing with 'none'. Missing components are resolved to zero during color space conversion.
// https://drafts.csswg.org/css-color-4/#missing
fuzzy_test_computed_color(`rgb(from rebeccapurple none none none)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple none none none / none)`, `color(srgb 0 0 0 / none)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g none)`, `color(srgb 0.4 0.2 0)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g none / alpha)`, `color(srgb 0.4 0.2 0)`);
fuzzy_test_computed_color(`rgb(from rebeccapurple r g b / none)`, `color(srgb 0.4 0.2 0.6 / none)`);
fuzzy_test_computed_color(`rgb(from rgb(20% 40% 60% / 80%) r g none / alpha)`, `color(srgb 0.2 0.4 0 / 0.8)`);
fuzzy_test_computed_color(`rgb(from rgb(20% 40% 60% / 80%) r g b / none)`, `color(srgb 0.2 0.4 0.6 / none)`);
fuzzy_test_computed_color(`rgb(from rgb(none none none) r g b)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`rgb(from rgb(none none none / none) r g b / alpha)`, `color(srgb 0 0 0 / 0)`);
fuzzy_test_computed_color(`rgb(from rgb(20% none 60%) r g b)`, `color(srgb 0.2 0 0.6)`);
fuzzy_test_computed_color(`rgb(from rgb(20% 40% 60% / none) r g b / alpha)`, `color(srgb 0.2 0.4 0.6 / 0)`);
// color-mix
fuzzy_test_computed_color(`rgb(from color-mix(in srgb, red, red) r g b / alpha)`, `color(srgb 1 0 0)`);
// hsl(from ...)
// Testing no modifications.
fuzzy_test_computed_color(`hsl(from rebeccapurple h s l)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s l / alpha)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h s l / alpha)`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`hsl(from hsl(120deg 20% 50% / .5) h s l / alpha)`, `color(srgb 0.4 0.6 0.4 / 0.5)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`hsl(from hsl(from rebeccapurple h s l) h s l)`, `color(srgb 0.4 0.2 0.6)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`hsl(from rebeccapurple 0 0% 0%)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple 0deg 0% 0%)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple 0 0% 0% / 0)`, `color(srgb 0 0 0 / 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple 0deg 0% 0% / 0)`, `color(srgb 0 0 0 / 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple 0 s l / alpha)`, `color(srgb 0.6 0.2 0.2)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple 0deg s l / alpha)`, `color(srgb 0.6 0.2 0.2)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h 0% l / alpha)`, `color(srgb 0.4 0.4 0.4)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s 0% / alpha)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s l / 0)`, `color(srgb 0.4 0.2 0.6 / 0)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) 0 s l / alpha)`, `color(srgb 0.6 0.2 0.2 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) 0deg s l / alpha)`, `color(srgb 0.6 0.2 0.2 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h 0% l / alpha)`, `color(srgb 0.4 0.4 0.4 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h s 0% / alpha)`, `color(srgb 0 0 0 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h s l / 0)`, `color(srgb 0.2 0.4 0.6 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`hsl(from rebeccapurple 25 s l / alpha)`, `color(srgb 0.6 0.3667 0.2)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple 25deg s l / alpha)`, `color(srgb 0.6 0.3667 0.2)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h 20% l / alpha)`, `color(srgb 0.4 0.32 0.48)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s 20% / alpha)`, `color(srgb 0.2 0.1 0.3)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s l / .25)`, `color(srgb 0.4 0.2 0.6 / 0.25)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) 25 s l / alpha)`, `color(srgb 0.6 0.3667 0.2 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) 25deg s l / alpha)`, `color(srgb 0.6 0.3667 0.2 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h 20% l / alpha)`, `color(srgb 0.32 0.4 0.48 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h s 20% / alpha)`, `color(srgb 0.1 0.2 0.3 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h s l / .2)`, `color(srgb 0.2 0.4 0.6 / 0.2)`);
// Testing valid permutation (types match).
fuzzy_test_computed_color(`hsl(from rebeccapurple h l s)`, `color(srgb 0.5 0.3 0.7)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h alpha l / s)`, `color(srgb 0.4 0 0.8 / 0.5)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h l l / l)`, `color(srgb 0.4 0.24 0.56 / 0.4)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h alpha alpha / alpha)`, `color(srgb 1 1 1)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h l s)`, `color(srgb 0.3 0.5 0.7 / 0.8)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h alpha l / s)`, `color(srgb 0.08 0.4 0.72 / 0.5)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h l l / l)`, `color(srgb 0.24 0.4 0.56 / 0.4)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) h alpha alpha / alpha)`, `color(srgb 0.64 0.8 0.96 / 0.8)`);
// Testing with calc().
fuzzy_test_computed_color(`hsl(from rebeccapurple calc(h) calc(s) calc(l))`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hsl(from rgb(20%, 40%, 60%, 80%) calc(h) calc(s) calc(l) / calc(alpha))`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`hsl(from hsl(20 30 40 / 0.8) calc(h + 1) calc(s + 1) calc(l + 1) / calc(alpha + 0.01))`, `color(srgb 0.54 0.37 0.28 / 0.81)`); // hsl(21 31 41)
fuzzy_test_computed_color(`hsl(from rebeccapurple calc((h / 360) * 360deg) calc((s / 100) * 100%) calc((l / 100) * 100%) / calc(alpha * 100%))`, `color(srgb 0.4 0.2 0.6)`);
// Testing with 'none'. Missing components are resolved to zero during color space conversion.
// https://drafts.csswg.org/css-color-4/#missing
fuzzy_test_computed_color(`hsl(from rebeccapurple none none none)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple none none none / none)`, `color(srgb 0 0 0 / none)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s none)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s none / alpha)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple h s l / none)`, `color(srgb 0.4 0.2 0.6 / none)`);
fuzzy_test_computed_color(`hsl(from rebeccapurple none s l / alpha)`, `color(srgb 0.6 0.2 0.2)`);
fuzzy_test_computed_color(`hsl(from hsl(120deg 20% 50% / .5) h s none / alpha)`, `color(srgb 0 0 0 / 0.5)`);
fuzzy_test_computed_color(`hsl(from hsl(120deg 20% 50% / .5) h s l / none)`, `color(srgb 0.4 0.6 0.4 / none)`);
fuzzy_test_computed_color(`hsl(from hsl(120deg 20% 50% / .5) none s l / alpha)`, `color(srgb 0.6 0.4 0.4 / 0.5)`);
fuzzy_test_computed_color(`hsl(from hsl(none none none) h s l)`, `color(srgb 0 0 0)`);
fuzzy_test_computed_color(`hsl(from hsl(none none none / none) h s l / alpha)`, `color(srgb 0 0 0 / 0)`);
fuzzy_test_computed_color(`hsl(from hsl(120deg none 50% / .5) h s l)`, `color(srgb 0.5 0.5 0.5 / 0.5)`);
fuzzy_test_computed_color(`hsl(from hsl(120deg 20% 50% / none) h s l / alpha)`, `color(srgb 0.4 0.6 0.4 / 0)`);
fuzzy_test_computed_color(`hsl(from hsl(none 20% 50% / .5) h s l / alpha)`, `color(srgb 0.6 0.4 0.4 / 0.5)`);
// color-mix
fuzzy_test_computed_color(`hsl(from color-mix(in srgb, red, red) h s l / alpha)`, `color(srgb 1 0 0)`);
// hwb(from ...)
// Testing no modifications.
fuzzy_test_computed_color(`hwb(from rebeccapurple h w b)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w b / alpha)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h w b / alpha)`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`hwb(from hsl(120deg 20% 50% / .5) h w b / alpha)`, `color(srgb 0.4 0.6 0.4 / 0.5)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`hwb(from hwb(from rebeccapurple h w b) h w b)`, `color(srgb 0.4 0.2 0.6)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`hwb(from rebeccapurple 0 0% 0%)`, `color(srgb 1 0 0)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple 0deg 0% 0%)`, `color(srgb 1 0 0)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple 0 0% 0% / 0)`, `color(srgb 1 0 0 / 0)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple 0deg 0% 0% / 0)`, `color(srgb 1 0 0 / 0)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple 0 w b / alpha)`, `color(srgb 0.6 0.2 0.2)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple 0deg w b / alpha)`, `color(srgb 0.6 0.2 0.2)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h 0% b / alpha)`, `color(srgb 0.3 0 0.6)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w 0% / alpha)`, `color(srgb 0.6 0.2 1)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w b / 0)`, `color(srgb 0.4 0.2 0.6 / 0)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) 0 w b / alpha)`, `color(srgb 0.6 0.2 0.2 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) 0deg w b / alpha)`, `color(srgb 0.6 0.2 0.2 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h 0% b / alpha)`, `color(srgb 0 0.3 0.6 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h w 0% / alpha)`, `color(srgb 0.2 0.6 1 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h w b / 0)`, `color(srgb 0.2 0.4 0.6 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`hwb(from rebeccapurple 25 w b / alpha)`, `color(srgb 0.6 0.3667 0.2)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple 25deg w b / alpha)`, `color(srgb 0.6 0.3667 0.2)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h 20% b / alpha)`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w 20% / alpha)`, `color(srgb 0.5 0.2 0.8)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w b / .2)`, `color(srgb 0.4 0.2 0.6 / 0.2)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) 25 w b / alpha)`, `color(srgb 0.6 0.3667 0.2 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) 25deg w b / alpha)`, `color(srgb 0.6 0.3667 0.2 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h 20% b / alpha)`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h w 20% / alpha)`, `color(srgb 0.2 0.5 0.8 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h w b / .2)`, `color(srgb 0.2 0.4 0.6 / 0.2)`);
// Testing valid permutation (types match).
fuzzy_test_computed_color(`hwb(from rebeccapurple h b w)`, `color(srgb 0.6 0.4 0.8)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h alpha w / b)`, `color(srgb 0.8333 0.8333 0.8333 / 0.4)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w w / w)`, `color(srgb 0.5 0.2 0.8 / 0.2)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h alpha alpha / alpha)`, `color(srgb 0.5 0.5 0.5)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h b w)`, `color(srgb 0.4 0.6 0.8 / 0.8)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h alpha w / b)`, `color(srgb 0.8 0.8 0.8 / 0.4)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h w w / w)`, `color(srgb 0.2 0.5 0.8 / 0.2)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) h alpha alpha / alpha)`, `color(srgb 0.5 0.5 0.5 / 0.8)`);
// Testing with calc().
fuzzy_test_computed_color(`hwb(from rebeccapurple calc(h) calc(w) calc(b))`, `color(srgb 0.4 0.2 0.6)`);
fuzzy_test_computed_color(`hwb(from rgb(20%, 40%, 60%, 80%) calc(h) calc(w) calc(b) / calc(alpha))`, `color(srgb 0.2 0.4 0.6 / 0.8)`);
fuzzy_test_computed_color(`hwb(from hwb(20 30 40 / 0.8) calc(h + 1) calc(w + 1) calc(b + 1) / calc(alpha + 0.01))`, `color(srgb 0.59 0.41 0.31 / 0.81)`); // hwb(21 31 41)
fuzzy_test_computed_color(`hwb(from rebeccapurple calc((h / 360) * 360deg) calc((w / 100) * 100%) calc((b / 100) * 100%) / calc(alpha * 100%))`, `color(srgb 0.4 0.2 0.6)`);
// Testing with 'none'. Missing components are resolved to zero during color space conversion.
// https://drafts.csswg.org/css-color-4/#missing
fuzzy_test_computed_color(`hwb(from rebeccapurple none none none)`, `color(srgb 1 0 0)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple none none none / none)`, `color(srgb 1 0 0 / none)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w none)`, `color(srgb 0.6 0.2 1)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w none / alpha)`, `color(srgb 0.6 0.2 1)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple h w b / none)`, `color(srgb 0.4 0.2 0.6 / none)`);
fuzzy_test_computed_color(`hwb(from rebeccapurple none w b / alpha)`, `color(srgb 0.6 0.2 0.2)`);
fuzzy_test_computed_color(`hwb(from hwb(120deg 20% 50% / .5) h w none / alpha)`, `color(srgb 0.2 1 0.2 / 0.5)`);
fuzzy_test_computed_color(`hwb(from hwb(120deg 20% 50% / .5) h w b / none)`, `color(srgb 0.2 0.5 0.2 / none)`);
fuzzy_test_computed_color(`hwb(from hwb(120deg 20% 50% / .5) none w b / alpha)`, `color(srgb 0.5 0.2 0.2 / 0.5)`);
fuzzy_test_computed_color(`hwb(from hwb(none none none) h w b)`, `color(srgb 1 0 0)`);
fuzzy_test_computed_color(`hwb(from hwb(none none none / none) h w b / alpha)`, `color(srgb 1 0 0 / 0)`);
fuzzy_test_computed_color(`hwb(from hwb(120deg none 50% / .5) h w b)`, `color(srgb 0 0.5 0 / 0.5)`);
fuzzy_test_computed_color(`hwb(from hwb(120deg 20% 50% / none) h w b / alpha)`, `color(srgb 0.2 0.5 0.2 / 0)`);
fuzzy_test_computed_color(`hwb(from hwb(none 20% 50% / .5) h w b / alpha)`, `color(srgb 0.5 0.2 0.2 / 0.5)`);
// color-mix
fuzzy_test_computed_color(`hwb(from color-mix(in srgb, red, red) h w b / alpha)`, `color(srgb 1 0 0)`);
// lab()
// Testing no modifications.
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a b)`, `lab(25 20 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a b / alpha)`, `lab(25 20 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a b / alpha)`, `lab(25 20 50 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(200 300 400 / 500%) l a b / alpha)`, `lab(100 300 400)`);
fuzzy_test_computed_color(`lab(from lab(-200 -300 -400 / -500%) l a b / alpha)`, `lab(0 -300 -400 / 0)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`lab(from lab(from lab(25 20 50) l a b) l a b)`, `lab(25 20 50)`);
// Testing non-lab origin to see conversion.
fuzzy_test_computed_color(`lab(from color(display-p3 0 0 0) l a b / alpha)`, `lab(0 0 0)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`lab(from lab(25 20 50) 0 0 0)`, `lab(0 0 0)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) 0 0 0 / 0)`, `lab(0 0 0 / 0)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) 0 a b / alpha)`, `lab(0 20 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l 0 b / alpha)`, `lab(25 0 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a 0 / alpha)`, `lab(25 20 0)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a b / 0)`, `lab(25 20 50 / 0)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) 0 a b / alpha)`, `lab(0 20 50 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l 0 b / alpha)`, `lab(25 0 50 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a 0 / alpha)`, `lab(25 20 0 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a b / 0)`, `lab(25 20 50 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`lab(from lab(25 20 50) 35 a b / alpha)`, `lab(35 20 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l 35 b / alpha)`, `lab(25 35 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a 35 / alpha)`, `lab(25 20 35)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a b / .35)`, `lab(25 20 50 / 0.35)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) 35 a b / alpha)`, `lab(35 20 50 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l 35 b / alpha)`, `lab(25 35 50 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a 35 / alpha)`, `lab(25 20 35 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a b / .35)`, `lab(25 20 50 / 0.35)`);
fuzzy_test_computed_color(`lab(from lab(0.7 45 30 / 40%) 200 300 400 / 500)`, `lab(100 300 400)`);
fuzzy_test_computed_color(`lab(from lab(0.7 45 30 / 40%) -200 -300 -400 / -500)`, `lab(0 -300 -400 / 0)`);
// Testing valid permutation (types match).
fuzzy_test_computed_color(`lab(from lab(25 20 50) l b a)`, `lab(25 50 20)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a a / a)`, `lab(25 20 20)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l b a)`, `lab(25 50 20 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a a / a)`, `lab(25 20 20)`);
// Testing with calc().
fuzzy_test_computed_color(`lab(from lab(25 20 50) calc(l) calc(a) calc(b))`, `lab(25 20 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) calc(l) calc(a) calc(b) / calc(alpha))`, `lab(25 20 50 / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(50 5 10 / 0.8) calc(l + 1) calc(a + 1) calc(b + 1) / calc(alpha + 0.01))`, `lab(51 6 11 / 0.81)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) calc((l / 100) * 100%) calc((a / 125) * 100%) calc((b / 125) * 100%) / calc(alpha * 100%))`, `lab(25 20 50)`);
// Testing with 'none'.
fuzzy_test_computed_color(`lab(from lab(25 20 50) none none none)`, `lab(none none none)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) none none none / none)`, `lab(none none none / none)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a none)`, `lab(25 20 none)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a none / alpha)`, `lab(25 20 none)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50) l a b / none)`, `lab(25 20 50 / none)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a none / alpha)`, `lab(25 20 none / 0.4)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / 40%) l a b / none)`, `lab(25 20 50 / none)`);
// FIXME: Clarify with spec editors if 'none' should pass through to the constants.
fuzzy_test_computed_color(`lab(from lab(none none none) l a b)`, `lab(0 0 0)`);
fuzzy_test_computed_color(`lab(from lab(none none none / none) l a b / alpha)`, `lab(0 0 0 / 0)`);
fuzzy_test_computed_color(`lab(from lab(25 none 50) l a b)`, `lab(25 0 50)`);
fuzzy_test_computed_color(`lab(from lab(25 20 50 / none) l a b / alpha)`, `lab(25 20 50 / 0)`);
// color-mix
fuzzy_test_computed_color(`lab(from color-mix(in lab, lab(25 20 50), lab(25 20 50)) l a b / alpha)`, `lab(25 20 50)`);
// oklab()
// Testing no modifications.
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a b)`, `oklab(0.25 0.2 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a b / alpha)`, `oklab(0.25 0.2 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a b / alpha)`, `oklab(0.25 0.2 0.5 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(2 3 4 / 500%) l a b / alpha)`, `oklab(1 3 4)`);
fuzzy_test_computed_color(`oklab(from oklab(-2 -3 -4 / -500%) l a b / alpha)`, `oklab(0 -3 -4 / 0)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`oklab(from oklab(from oklab(0.25 0.2 0.5) l a b) l a b)`, `oklab(0.25 0.2 0.5)`);
// Testing non-oklab origin to see conversion.
fuzzy_test_computed_color(`oklab(from color(display-p3 0 0 0) l a b / alpha)`, `oklab(0 0 0)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) 0 0 0)`, `oklab(0 0 0)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) 0 0 0 / 0)`, `oklab(0 0 0 / 0)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) 0 a b / alpha)`, `oklab(0 0.2 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l 0 b / alpha)`, `oklab(0.25 0 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a 0 / alpha)`, `oklab(0.25 0.2 0)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a b / 0)`, `oklab(0.25 0.2 0.5 / 0)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) 0 a b / alpha)`, `oklab(0 0.2 0.5 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l 0 b / alpha)`, `oklab(0.25 0 0.5 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a 0 / alpha)`, `oklab(0.25 0.2 0 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a b / 0)`, `oklab(0.25 0.2 0.5 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) 0.35 a b / alpha)`, `oklab(0.35 0.2 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l 0.35 b / alpha)`, `oklab(0.25 0.35 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a 0.35 / alpha)`, `oklab(0.25 0.2 0.35)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a b / .35)`, `oklab(0.25 0.2 0.5 / 0.35)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) 0.35 a b / alpha)`, `oklab(0.35 0.2 0.5 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l 0.35 b / alpha)`, `oklab(0.25 0.35 0.5 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a 0.35 / alpha)`, `oklab(0.25 0.2 0.35 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a b / .35)`, `oklab(0.25 0.2 0.5 / 0.35)`);
fuzzy_test_computed_color(`oklab(from oklab(0.7 0.45 0.3 / 40%) 2 3 4 / 500)`, `oklab(1 3 4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.7 0.45 0.3 / 40%) -2 -3 -4 / -500)`, `oklab(0 -3 -4 / 0)`);
// Testing valid permutation (types match).
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l b a)`, `oklab(0.25 0.5 0.2)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a a / a)`, `oklab(0.25 0.2 0.2 / 0.2)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l b a)`, `oklab(0.25 0.5 0.2 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a a / a)`, `oklab(0.25 0.2 0.2 / 0.2)`);
// Testing with calc().
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) calc(l) calc(a) calc(b))`, `oklab(0.25 0.2 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) calc(l) calc(a) calc(b) / calc(alpha))`, `oklab(0.25 0.2 0.5 / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.5 .05 0.1 / 0.8) calc(l + 0.01) calc(a + 0.01) calc(b + 0.01) / calc(alpha + 0.01))`, `oklab(0.51 .06 0.11 / 0.81)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) calc(l * 100%) calc((a / 0.4) * 100%) calc((b / 0.4) * 100%) / calc(alpha * 100%))`, `oklab(0.25 0.2 0.5)`);
// Testing with 'none'.
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) none none none)`, `oklab(none none none)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) none none none / none)`, `oklab(none none none / none)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a none)`, `oklab(0.25 0.2 none)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a none / alpha)`, `oklab(0.25 0.2 none)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5) l a b / none)`, `oklab(0.25 0.2 0.5 / none)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a none / alpha)`, `oklab(0.25 0.2 none / 0.4)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / 40%) l a b / none)`, `oklab(0.25 0.2 0.5 / none)`);
// FIXME: Clarify with spec editors if 'none' should pass through to the constants.
fuzzy_test_computed_color(`oklab(from oklab(none none none) l a b)`, `oklab(0 0 0)`);
fuzzy_test_computed_color(`oklab(from oklab(none none none / none) l a b / alpha)`, `oklab(0 0 0 / 0)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 none 0.5) l a b)`, `oklab(0.25 0 0.5)`);
fuzzy_test_computed_color(`oklab(from oklab(0.25 0.2 0.5 / none) l a b / alpha)`, `oklab(0.25 0.2 0.5 / 0)`);
// color-mix
fuzzy_test_computed_color(`oklab(from color-mix(in oklab, oklab(0.25 0.2 0.5), oklab(0.25 0.2 0.5)) l a b / alpha)`, `oklab(0.25 0.2 0.5)`);
// lch()
// Testing no modifications.
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c h)`, `lch(0.7 45 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c h / alpha)`, `lch(0.7 45 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c h / alpha)`, `lch(0.7 45 30 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(200 300 400 / 500%) l c h / alpha)`, `lch(100 300 40)`);
fuzzy_test_computed_color(`lch(from lch(-200 -300 -400 / -500%) l c h / alpha)`, `lch(0 0 320 / 0)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`lch(from lch(from lch(0.7 45 30) l c h) l c h)`, `lch(0.7 45 30)`);
// Testing non-sRGB origin colors (no gamut mapping will happen since the destination is not a bounded RGB color space).
fuzzy_test_computed_color(`lch(from color(display-p3 0 0 0) l c h / alpha)`, `lch(0 0 0)`);
fuzzy_test_computed_color(`lch(from lab(0.7 45 30) l c h / alpha)`, `lch(0.7 54.08327 33.690067)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) 0 0 0)`, `lch(0 0 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) 0 0 0deg)`, `lch(0 0 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) 0 0 0 / 0)`, `lch(0 0 0 / 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) 0 0 0deg / 0)`, `lch(0 0 0 / 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) 0 c h / alpha)`, `lch(0 45 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l 0 h / alpha)`, `lch(0.7 0 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c 0 / alpha)`, `lch(0.7 45 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c 0deg / alpha)`, `lch(0.7 45 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c h / 0)`, `lch(0.7 45 30 / 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) 0 c h / alpha)`, `lch(0 45 30 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l 0 h / alpha)`, `lch(0.7 0 30 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c 0 / alpha)`, `lch(0.7 45 0 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c 0deg / alpha)`, `lch(0.7 45 0 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c h / 0)`, `lch(0.7 45 30 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) 25 c h / alpha)`, `lch(25 45 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l 25 h / alpha)`, `lch(0.7 25 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c 25 / alpha)`, `lch(0.7 45 25)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c 25deg / alpha)`, `lch(0.7 45 25)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c h / .25)`, `lch(0.7 45 30 / 0.25)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) 25 c h / alpha)`, `lch(25 45 30 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l 25 h / alpha)`, `lch(0.7 25 30 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c 25 / alpha)`, `lch(0.7 45 25 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c 25deg / alpha)`, `lch(0.7 45 25 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c h / .25)`, `lch(0.7 45 30 / 0.25)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) 200 300 400 / 500)`, `lch(100 300 40)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) -200 -300 -400 / -500)`, `lch(0 0 320 / 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) 50 120 400deg / 500)`, `lch(50 120 40)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) 50 120 -400deg / -500)`, `lch(50 120 320 / 0)`);
// Testing valid permutation (types match).
// NOTE: 'c' is a vaild hue, as hue is <angle>|<number>.
fuzzy_test_computed_color(`lch(from lch(.7 45 30) l c c / alpha)`, `lch(0.7 45 45)`);
fuzzy_test_computed_color(`lch(from lch(.7 45 30 / 40%) l c c / alpha)`, `lch(0.7 45 45 / 0.4)`);
// Testing with calc().
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) calc(l) calc(c) calc(h))`, `lch(0.7 45 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) calc(l) calc(c) calc(h) / calc(alpha))`, `lch(0.7 45 30 / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(50 5 10 / 0.8) calc(l + 1) calc(c + 1) calc(h + 1) / calc(alpha + 0.01))`, `lch(51 6 11 / 0.81)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) calc((l / 100) * 100%) calc((c / 150) * 100%) calc((h / 360) * 360deg) / calc(alpha * 100%))`, `lch(0.7 45 30)`);
// Testing with 'none'.
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) none none none)`, `lch(none none none)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) none none none / none)`, `lch(none none none / none)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c none)`, `lch(0.7 45 none)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c none / alpha)`, `lch(0.7 45 none)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30) l c h / none)`, `lch(0.7 45 30 / none)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c none / alpha)`, `lch(0.7 45 none / 0.4)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / 40%) l c h / none)`, `lch(0.7 45 30 / none)`);
// FIXME: Clarify with spec editors if 'none' should pass through to the constants.
fuzzy_test_computed_color(`lch(from lch(none none none) l c h)`, `lch(0 0 0)`);
fuzzy_test_computed_color(`lch(from lch(none none none / none) l c h / alpha)`, `lch(0 0 0 / 0)`);
fuzzy_test_computed_color(`lch(from lch(0.7 none 30) l c h)`, `lch(0.7 0 30)`);
fuzzy_test_computed_color(`lch(from lch(0.7 45 30 / none) l c h / alpha)`, `lch(0.7 45 30 / 0)`);
// color-mix
fuzzy_test_computed_color(`lch(from color-mix(in lch, lch(70 45 30), lch(70 45 30)) l c h / alpha)`, `lch(70 45 30)`);
// oklch()
// Testing no modifications.
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c h)`, `oklch(0.7 0.45 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c h / alpha)`, `oklch(0.7 0.45 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c h / alpha)`, `oklch(0.7 0.45 30 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(2 3 400 / 500%) l c h / alpha)`, `oklch(1 3 40)`);
fuzzy_test_computed_color(`oklch(from oklch(-2 -3 -400 / -500%) l c h / alpha)`, `oklch(0 0 320 / 0)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`oklch(from oklch(from oklch(0.7 0.45 30) l c h) l c h)`, `oklch(0.7 0.45 30)`);
// Testing non-sRGB origin colors (no gamut mapping will happen since the destination is not a bounded RGB color space).
fuzzy_test_computed_color(`oklch(from color(display-p3 0 0 0) l c h / alpha)`, `oklch(0 0 0)`);
// TODO: redo conversion with oklab(0.7 0.45 0.3)
fuzzy_test_computed_color(`oklch(from oklab(0.7 45 30) l c h / alpha)`, `oklch(0.7 54.08327 33.690067)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) 0 0 0)`, `oklch(0 0 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) 0 0 0deg)`, `oklch(0 0 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) 0 0 0 / 0)`, `oklch(0 0 0 / 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) 0 0 0deg / 0)`, `oklch(0 0 0 / 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) 0 c h / alpha)`, `oklch(0 0.45 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l 0 h / alpha)`, `oklch(0.7 0 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c 0 / alpha)`, `oklch(0.7 0.45 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c 0deg / alpha)`, `oklch(0.7 0.45 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c h / 0)`, `oklch(0.7 0.45 30 / 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) 0 c h / alpha)`, `oklch(0 0.45 30 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l 0 h / alpha)`, `oklch(0.7 0 30 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c 0 / alpha)`, `oklch(0.7 0.45 0 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c 0deg / alpha)`, `oklch(0.7 0.45 0 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c h / 0)`, `oklch(0.7 0.45 30 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) 0.25 c h / alpha)`, `oklch(0.25 0.45 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l 0.25 h / alpha)`, `oklch(0.7 0.25 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c 25 / alpha)`, `oklch(0.7 0.45 25)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c 25deg / alpha)`, `oklch(0.7 0.45 25)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c h / .25)`, `oklch(0.7 0.45 30 / 0.25)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) 0.25 c h / alpha)`, `oklch(0.25 0.45 30 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l 0.25 h / alpha)`, `oklch(0.7 0.25 30 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c 25 / alpha)`, `oklch(0.7 0.45 25 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c 25deg / alpha)`, `oklch(0.7 0.45 25 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c h / .25)`, `oklch(0.7 0.45 30 / 0.25)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) 2 3 400 / 500)`, `oklch(1 3 40)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) -2 -3 -400 / -500)`, `oklch(0 0 320 / 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) 0.5 1.2 400deg / 500)`, `oklch(0.5 1.2 40)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) 0.5 1.2 -400deg / -500)`, `oklch(0.5 1.2 320 / 0)`);
// Testing valid permutation (types match).
// NOTE: 'c' is a vaild hue, as hue is <angle>|<number>.
fuzzy_test_computed_color(`oklch(from oklch(.7 0.45 30) l c c / alpha)`, `oklch(0.7 0.45 0.45)`);
fuzzy_test_computed_color(`oklch(from oklch(.7 0.45 30 / 40%) l c c / alpha)`, `oklch(0.7 0.45 0.45 / 0.4)`);
// Testing with calc().
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) calc(l) calc(c) calc(h))`, `oklch(0.7 0.45 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) calc(l) calc(c) calc(h) / calc(alpha))`, `oklch(0.7 0.45 30 / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.5 .05 0.1 / 0.8) calc(l + 0.01) calc(c + 0.01) calc(h + 0.01) / calc(alpha + 0.01))`, `oklch(0.51 .06 0.11 / 0.81)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) calc(l * 100%) calc((c / 0.4) * 100%) calc((h / 360) * 360deg) / calc(alpha * 100%))`, `oklch(0.7 0.45 30)`);
// Testing with 'none'.
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) none none none)`, `oklch(none none none)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) none none none / none)`, `oklch(none none none / none)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c none)`, `oklch(0.7 0.45 none)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c none / alpha)`, `oklch(0.7 0.45 none)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30) l c h / none)`, `oklch(0.7 0.45 30 / none)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c none / alpha)`, `oklch(0.7 0.45 none / 0.4)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / 40%) l c h / none)`, `oklch(0.7 0.45 30 / none)`);
// FIXME: Clarify with spec editors if 'none' should pass through to the constants.
fuzzy_test_computed_color(`oklch(from oklch(none none none) l c h)`, `oklch(0 0 0)`);
fuzzy_test_computed_color(`oklch(from oklch(none none none / none) l c h / alpha)`, `oklch(0 0 0 / 0)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 none 30) l c h)`, `oklch(0.7 0 30)`);
fuzzy_test_computed_color(`oklch(from oklch(0.7 0.45 30 / none) l c h / alpha)`, `oklch(0.7 0.45 30 / 0)`);
// color-mix
fuzzy_test_computed_color(`oklch(from color-mix(in oklch, oklch(0.7 0.45 30), oklch(0.7 0.45 30)) l c h / alpha)`, `oklch(0.7 0.45 30)`);
for (const colorSpace of [ "srgb", "srgb-linear", "a98-rgb", "rec2020", "prophoto-rgb", "display-p3" ]) {
// Testing no modifications.
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b)`, `color(${colorSpace} 0.7 0.5 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0.7 0.5 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g b)`, `color(${colorSpace} 0.7 0.5 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0.7 0.5 0.3 / 0.4)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`color(from color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b) ${colorSpace} r g b)`, `color(${colorSpace} 0.7 0.5 0.3)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 0 0 0)`, `color(${colorSpace} 0 0 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 0 0 0 / 0)`, `color(${colorSpace} 0 0 0 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 0 g b / alpha)`, `color(${colorSpace} 0 0.5 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r 0 b / alpha)`, `color(${colorSpace} 0.7 0 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g 0 / alpha)`, `color(${colorSpace} 0.7 0.5 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b / 0)`, `color(${colorSpace} 0.7 0.5 0.3 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} 0 g b / alpha)`, `color(${colorSpace} 0 0.5 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r 0 b / alpha)`, `color(${colorSpace} 0.7 0 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g 0 / alpha)`, `color(${colorSpace} 0.7 0.5 0 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g b / 0)`, `color(${colorSpace} 0.7 0.5 0.3 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 0.2 g b / alpha)`, `color(${colorSpace} 0.2 0.5 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 20% g b / alpha)`, `color(${colorSpace} 0.2 0.5 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r 0.2 b / alpha)`, `color(${colorSpace} 0.7 0.2 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r 20% b / alpha)`, `color(${colorSpace} 0.7 0.2 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g 0.2 / alpha)`, `color(${colorSpace} 0.7 0.5 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g 20% / alpha)`, `color(${colorSpace} 0.7 0.5 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b / 0.2)`, `color(${colorSpace} 0.7 0.5 0.3 / 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b / 20%)`, `color(${colorSpace} 0.7 0.5 0.3 / 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} 0.2 g b / alpha)`, `color(${colorSpace} 0.2 0.5 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} 20% g b / alpha)`, `color(${colorSpace} 0.2 0.5 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r 0.2 b / alpha)`, `color(${colorSpace} 0.7 0.2 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r 20% b / alpha)`, `color(${colorSpace} 0.7 0.2 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g 0.2 / alpha)`, `color(${colorSpace} 0.7 0.5 0.2 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g 20% / alpha)`, `color(${colorSpace} 0.7 0.5 0.2 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g b / 0.2)`, `color(${colorSpace} 0.7 0.5 0.3 / 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g b / 20%)`, `color(${colorSpace} 0.7 0.5 0.3 / 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 2 3 4)`, `color(${colorSpace} 2 3 4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 2 3 4 / 5)`, `color(${colorSpace} 2 3 4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} -2 -3 -4)`, `color(${colorSpace} -2 -3 -4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} -2 -3 -4 / -5)`, `color(${colorSpace} -2 -3 -4 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 200% 300% 400%)`, `color(${colorSpace} 2 3 4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} 200% 300% 400% / 500%)`, `color(${colorSpace} 2 3 4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} -200% -300% -400%)`, `color(${colorSpace} -2 -3 -4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} -200% -300% -400% / -500%)`, `color(${colorSpace} -2 -3 -4 / 0)`);
// Testing valid permutation (types match).
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} g b r)`, `color(${colorSpace} 0.5 0.3 0.7)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} b alpha r / g)`, `color(${colorSpace} 0.3 1 0.7 / 0.5)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r r r / r)`, `color(${colorSpace} 0.7 0.7 0.7 / 0.7)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} alpha alpha alpha / alpha)`, `color(${colorSpace} 1 1 1)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} g b r)`, `color(${colorSpace} 0.5 0.3 0.7 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} b alpha r / g)`, `color(${colorSpace} 0.3 0.4 0.7 / 0.5)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r r r / r)`, `color(${colorSpace} 0.7 0.7 0.7 / 0.7)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} alpha alpha alpha / alpha)`, `color(${colorSpace} 0.4 0.4 0.4 / 0.4)`);
// Testing out of gamut components.
fuzzy_test_computed_color(`color(from color(${colorSpace} 1.7 1.5 1.3) ${colorSpace} r g b)`, `color(${colorSpace} 1.7 1.5 1.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 1.7 1.5 1.3) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 1.7 1.5 1.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 1.7 1.5 1.3 / 140%) ${colorSpace} r g b)`, `color(${colorSpace} 1.7 1.5 1.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 1.7 1.5 1.3 / 140%) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 1.7 1.5 1.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} -0.7 -0.5 -0.3) ${colorSpace} r g b)`, `color(${colorSpace} -0.7 -0.5 -0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} -0.7 -0.5 -0.3) ${colorSpace} r g b / alpha)`, `color(${colorSpace} -0.7 -0.5 -0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} -0.7 -0.5 -0.3 / -40%) ${colorSpace} r g b)`, `color(${colorSpace} -0.7 -0.5 -0.3 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} -0.7 -0.5 -0.3 / -40%) ${colorSpace} r g b / alpha)`, `color(${colorSpace} -0.7 -0.5 -0.3 / 0)`);
// Testing with calc().
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} calc(r) calc(g) calc(b))`, `color(${colorSpace} 0.7 0.5 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} calc(r) calc(g) calc(b) / calc(alpha))`, `color(${colorSpace} 0.7 0.5 0.3 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 0.8) ${colorSpace} calc(r + 0.01) calc(g + 0.01) calc(b + 0.01) / calc(alpha + 0.01))`, `color(${colorSpace} 0.71 0.51 0.31 / 0.81)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} calc(r * 100%) calc(g * 100%) calc(b * 100%) / calc(alpha * 100%))`, `color(${colorSpace} 0.7 0.5 0.3)`);
// Testing with 'none'.
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} none none none)`, `color(${colorSpace} none none none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} none none none / none)`, `color(${colorSpace} none none none / none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g none)`, `color(${colorSpace} 0.7 0.5 none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g none / alpha)`, `color(${colorSpace} 0.7 0.5 none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3) ${colorSpace} r g b / none)`, `color(${colorSpace} 0.7 0.5 0.3 / none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g none / alpha)`, `color(${colorSpace} 0.7 0.5 none / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / 40%) ${colorSpace} r g b / none)`, `color(${colorSpace} 0.7 0.5 0.3 / none)`);
// FIXME: Clarify with spec editors if 'none' should pass through to the constants.
fuzzy_test_computed_color(`color(from color(${colorSpace} none none none) ${colorSpace} r g b)`, `color(${colorSpace} 0 0 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} none none none / none) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0 0 0 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 none 0.3) ${colorSpace} r g b)`, `color(${colorSpace} 0.7 0 0.3)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 0.7 0.5 0.3 / none) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0.7 0.5 0.3 / 0)`);
// color-mix
fuzzy_test_computed_color(`color(from color-mix(in xyz, color(${colorSpace} 0.7 0.5 0.3), color(${colorSpace} 0.7 0.5 0.3)) ${colorSpace} r g b / alpha)`, `color(${colorSpace} 0.7 0.5 0.3)`);
}
for (const colorSpace of [ "xyz", "xyz-d50", "xyz-d65" ]) {
const resultColorSpace = colorSpace == "xyz" ? "xyz-d65" : colorSpace;
// Testing no modifications.
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z)`, `color(${resultColorSpace} 7 -20.5 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z / alpha)`, `color(${resultColorSpace} 7 -20.5 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y z)`, `color(${resultColorSpace} 7 -20.5 100 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y z / alpha)`, `color(${resultColorSpace} 7 -20.5 100 / 0.4)`);
// Test nesting relative colors.
fuzzy_test_computed_color(`color(from color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z) ${colorSpace} x y z)`, `color(${resultColorSpace} 7 -20.5 100)`);
// Testing replacement with 0.
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} 0 0 0)`, `color(${resultColorSpace} 0 0 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} 0 0 0 / 0)`, `color(${resultColorSpace} 0 0 0 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} 0 y z / alpha)`, `color(${resultColorSpace} 0 -20.5 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x 0 z / alpha)`, `color(${resultColorSpace} 7 0 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y 0 / alpha)`, `color(${resultColorSpace} 7 -20.5 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z / 0)`, `color(${resultColorSpace} 7 -20.5 100 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} 0 y z / alpha)`, `color(${resultColorSpace} 0 -20.5 100 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x 0 z / alpha)`, `color(${resultColorSpace} 7 0 100 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y 0 / alpha)`, `color(${resultColorSpace} 7 -20.5 0 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y z / 0)`, `color(${resultColorSpace} 7 -20.5 100 / 0)`);
// Testing replacement with a constant.
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} 0.2 y z / alpha)`, `color(${resultColorSpace} 0.2 -20.5 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x 0.2 z / alpha)`, `color(${resultColorSpace} 7 0.2 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y 0.2 / alpha)`, `color(${resultColorSpace} 7 -20.5 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z / 0.2)`, `color(${resultColorSpace} 7 -20.5 100 / 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z / 20%)`, `color(${resultColorSpace} 7 -20.5 100 / 0.2)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} 0.2 y z / alpha)`, `color(${resultColorSpace} 0.2 -20.5 100 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x 0.2 z / alpha)`, `color(${resultColorSpace} 7 0.2 100 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y 0.2 / alpha)`, `color(${resultColorSpace} 7 -20.5 0.2 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y z / 0.2)`, `color(${resultColorSpace} 7 -20.5 100 / 0.2)`);
// Testing valid permutation (types match).
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} y z x)`, `color(${resultColorSpace} -20.5 100 7)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x x x / x)`, `color(${resultColorSpace} 7 7 7)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} y z x)`, `color(${resultColorSpace} -20.5 100 7 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x x x / x)`, `color(${resultColorSpace} 7 7 7)`);
// Testing with calc().
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} calc(x) calc(y) calc(z))`, `color(${resultColorSpace} 7 -20.5 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} calc(x) calc(y) calc(z) / calc(alpha))`, `color(${resultColorSpace} 7 -20.5 100 / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 0.8) ${colorSpace} calc(x + 1) calc(y + 1) calc(z + 1) / calc(alpha + 0.01))`, `color(${resultColorSpace} 8 -19.5 101 / 0.81)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} calc(x * 100%) calc(y * 100%) calc(z * 100%) / calc(alpha * 100%))`, `color(${resultColorSpace} 7 -20.5 100)`);
// Testing with 'none'.
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} none none none)`, `color(${resultColorSpace} none none none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} none none none / none)`, `color(${resultColorSpace} none none none / none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y none)`, `color(${resultColorSpace} 7 -20.5 none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y none / alpha)`, `color(${resultColorSpace} 7 -20.5 none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100) ${colorSpace} x y z / none)`, `color(${resultColorSpace} 7 -20.5 100 / none)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y none / alpha)`, `color(${resultColorSpace} 7 -20.5 none / 0.4)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / 40%) ${colorSpace} x y z / none)`, `color(${resultColorSpace} 7 -20.5 100 / none)`);
// FIXME: Clarify with spec editors if 'none' should pass through to the constants.
fuzzy_test_computed_color(`color(from color(${colorSpace} none none none) ${colorSpace} x y z)`, `color(${resultColorSpace} 0 0 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} none none none / none) ${colorSpace} x y z / alpha)`, `color(${resultColorSpace} 0 0 0 / 0)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 none 100) ${colorSpace} x y z)`, `color(${resultColorSpace} 7 0 100)`);
fuzzy_test_computed_color(`color(from color(${colorSpace} 7 -20.5 100 / none) ${colorSpace} x y z / alpha)`, `color(${resultColorSpace} 7 -20.5 100 / 0)`);
// color-mix
fuzzy_test_computed_color(`color(from color-mix(in xyz, color(${colorSpace} 0.7 0.5 0.3), color(${colorSpace} 0.7 0.5 0.3)) ${colorSpace} x y z / alpha)`, `color(${resultColorSpace} 0.7 0.5 0.3)`);
}
// Test origin colors with different color spaces, going both to and from srgb.
fuzzy_test_computed_color(`color(from color(srgb-linear 0.25 0.5 0.75) srgb r g b)`, `color(srgb 0.537121 0.735394 0.880852)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) srgb-linear r g b)`, `color(srgb-linear 0.050864 0.213993 0.522484)`, 0.001);
fuzzy_test_computed_color(`color(from color(display-p3 0.25 0.5 0.75) srgb r g b)`, `color(srgb 0.123874 0.507355 0.771198)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) display-p3 r g b)`, `color(display-p3 0.313084 0.494041 0.730118)`, 0.001);
fuzzy_test_computed_color(`color(from color(a98-rgb 0.25 0.5 0.75) srgb r g b)`, `color(srgb -0.153808 0.503925 0.763874)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) a98-rgb r g b)`, `color(a98-rgb 0.346851 0.496124 0.736271)`, 0.001);
fuzzy_test_computed_color(`color(from color(prophoto-rgb 0.25 0.5 0.75) srgb r g b)`, `color(srgb -0.510605 0.612396 0.825333)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) prophoto-rgb r g b)`, `color(prophoto-rgb 0.374905 0.416401 0.663692)`, 0.001);
fuzzy_test_computed_color(`color(from color(rec2020 0.25 0.5 0.75) srgb r g b)`, `color(srgb -0.280102 0.565536 0.79958)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) rec2020 r g b)`, `color(rec2020 0.331976 0.440887 0.696358)`, 0.001);
fuzzy_test_computed_color(`color(from color(xyz-d50 0.25 0.5 0.75) srgb r g b)`, `color(srgb -0.660065 0.874863 0.981117)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) xyz-d50 x y z)`, `color(xyz-d50 0.179349 0.196389 0.394585)`, 0.001);
fuzzy_test_computed_color(`color(from color(xyz-d65 0.25 0.5 0.75) srgb r g b)`, `color(srgb -0.611881 0.868732 0.856899)`, 0.001);
fuzzy_test_computed_color(`color(from color(srgb 0.25 0.5 0.75) xyz-d65 x y z)`, `color(xyz-d65 0.191791 0.201562 0.523057)`, 0.001);
fuzzy_test_computed_color(`lab(from color(srgb 0.25 0.5 0.75) l a b)`, `lab(51.4265 -5.21401 -40.1491)`, 0.02); // Larger values means larger epsilon.
fuzzy_test_computed_color(`color(from lab(67.5345 -8.6911 -41.6019) srgb r g b)`, `color(srgb 0.382744 0.672806 0.938545)`, 0.001);
fuzzy_test_computed_color(`oklab(from color(srgb 0.25 0.5 0.75) l a b)`, `oklab(0.585502 -0.0393846 -0.111503)`, 0.001);
fuzzy_test_computed_color(`color(from oklab(72.322% -0.0465 -0.1150) srgb r g b)`, `color(srgb 0.382504 0.672783 0.938919)`, 0.001);
fuzzy_test_computed_color(`lch(from color(srgb 0.25 0.5 0.75) l c h)`, `lch(51.4265 40.4863 262.601)`, 0.02); // Larger values means larger epsilon.
fuzzy_test_computed_color(`color(from lch(67.5345% 42.5 258.2) srgb r g b)`, `color(srgb 0.382744 0.672806 0.938545)`, 0.001);
fuzzy_test_computed_color(`oklch(from color(srgb 0.25 0.5 0.75) l c h)`, `oklch(0.585502 0.118254 250.546)`, 0.02); // Larger values means larger epsilon.
fuzzy_test_computed_color(`color(from oklch(72.322% 0.12403 247.996) srgb r g b)`, `color(srgb 0.382631 0.672756 0.938904)`, 0.001);
// Spec Examples: https://www.w3.org/TR/css-color-5/#relative-colors
// All examples here have multiple stages of calculations so minor disagreements in the values of keyword colors and other constants can compound.
// These tests require a wider epsilon of 0.02.
fuzzy_test_computed_color(`rgb(from var(--bg-color) r g b / 80%)`, `color(srgb 0 0 1 / 0.8)`, 0.02);
fuzzy_test_computed_color(`lch(from var(--color) calc(l / 2) c h)`, `lch(23.14 67.99 134.39)`, 0.02);
fuzzy_test_computed_color(`rgb(from var(--color) calc(r * .3 + g * .59 + b * .11) calc(r * .3 + g * .59 + b * .11) calc(r * .3 + g * .59 + b * .11))`, `color(srgb 0.3 0.3 0.3)`, 0.02);
fuzzy_test_computed_color(`lch(from var(--color) l 0 h)`, `lch(46.28 0 134.39)`, 0.02);
fuzzy_test_computed_color(`rgb(from indianred 255 g b)`, `color(srgb 1 0.36 0.36)`, 0.02);
fuzzy_test_computed_color(`hsl(from var(--accent) calc(h + 180) s l)`, `color(srgb 0.7 0.13 0.16)`, 0.02);
fuzzy_test_computed_color(`lab(from var(--mycolor) l a b / 100%)`, `lab(62.75 52.46 -34.12)`, 0.02);
fuzzy_test_computed_color(`lab(from var(--mycolor) l a b / calc(alpha * 0.8))`, `lab(62.75 52.46 -34.12 / 0.8)`, 0.02);
fuzzy_test_computed_color(`lab(from var(--mycolor) l 0 0)`, `lab(62.75 0 0)`, 0.02);
fuzzy_test_computed_color(`lch(from peru calc(l * 0.8) c h)`, `lch(49.80 54 63.68)`, 0.02);
fuzzy_test_computed_color(`LCH(from var(--accent) l c calc(h + 180))`, `lch(65.49 39.45 10.11)`, 0.02);
fuzzy_test_computed_color(`lch(from var(--mycolor) l 0 h)`, `lch(62.75 0 326.96)`, 0.02);
fuzzy_test_computed_color(`var(--mygray)`, `lch(62.75 0 326.96)`, 0.02);
fuzzy_test_computed_color(`lch(from var(--mygray) l 30 h)`, `lch(62.75 30 326.96)`, 0.02);
</script>
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