color2css 6.1

• Constructor accepts another color2css instance as input.
• Added ability to modify sRGB colors using HSV representation.

color2css 6.0

• Added support for OKlab and OKlch.
• Removed conversion across sRGB, CIE Lab, and OKlab color spaces.
• Fixed zero chroma hue swings when converting to HSL/LCH/OKlch.

color2css 5.0

• Added support for CIE Lab and LCH.
• Improved compatibility with CSS Color Module Level 4.

color2css 4.4

Added ability to calculate WCAG contrast ratios.

color2css 4.3

Use Exception classes from Standard PHP Library.

color2css 4.2

Constructor sets alpha to 1.0 if argument is absent.

color2css 4.1

Fixes to RGB and HSL interpretation.

color2css 4.0

Changes in this release:

• Added support for HWB definitions.
• Improved conversion precision.
• rgb() and hsl() methods output alpha.
• Removed rgba() and hsla() methods.

color2css 3.0

Added return types.

color2css 2.0

Added namespace.