Color Format issues

[meza]

Describe the issue

Custom color formats are disregarded in the generated css.
Currently it all gets converted to lab

Expected behavior

When using any custom color format like hls or oklch, the generated CSS should retain those formats.

Steps to reproduce

Using:

win32-x64
vite/5.2.10
node-v21.7.1
stylex: 0.6.1
vite-plugin-stylex-dev: 0.6.1
remix: 2.9.1

Define color variables that use specific color formats.

Test case

import * as stylex from '@stylexjs/stylex';

const hues = {
  amber: 73.12
};

export const colours = stylex.defineVars({
  amber01: 'hsl(45,88%,6%)',
  amber02: `oklch(22.05% 0.046 ${hues.amber}deg)`,
  amber03: `oklch(25.32% 0.056 ${hues.amber}deg)`,
  amber04: `oklch(28.43% 0.0638 ${hues.amber}deg)`,
  amber05: `oklch(31.66% 0.0709 ${hues.amber}deg)`,
  amber06: `oklch(35.74% 0.0786 ${hues.amber}deg)`,
  amber07: `oklch(40.86% 0.088 ${hues.amber}deg)`,
  amber08: `oklch(47.33% 0.1045 ${hues.amber}deg)`,
  amber09: `oklch(81.69% 0.1638 ${hues.amber}deg)`,
  amber10: `oklch(86.59% 0.1539 ${hues.amber}deg)`,
  amber11: `oklch(76.93% 0.162 ${hues.amber}deg)`,
  amber12: `oklch(96.7% 0.031 ${hues.amber}deg)`
});

Additional comments

I tried with the vite-stylex-plugin and I tried with the vite-stylex-plugin-dev.
My styles that aren't through stylex come out untouched on the other end of my build chain, as expected.

[meza]

What I just realised is that it gets converted to rgb as a default!

[meza]

Ignore this, lightningcss was the culprit!