Bug 324994 – Update color serialization for sRGB/HSL/HWB

• Status: RESOLVED
• Resolution: FIXED
• Component: CSS

[Sam Weinig]

There have been a few subtle tweaks to color serialization for sRGB/HSL/HWB colors.

For sRGB, any sRGB color with a "none" value now uses the color(srgb ...) serialization.

For HSL, any HSL color now uses the hsl() notation when it is nested or the result of a color-mix/rcs expression, and when using the hsl() notation, the saturation and lightness components should be serialized as percentages.

For HWB, any HWB color now uses the hwb() notation when it is nested or the result of a color-mix/rcs expression, and when using the hwb() notation, the whiteness and blackness components should be serialized as percentages.

[Sam Weinig]

The rules of HSL and HWB haven't actually changed as stated in the description. Instead it should read:

  - For HSL, when using the hsl() notation, the saturation and lightness components should be serialized as percentages.
  - For HWB, when using the hwb() notation, the whiteness and blackness components should be serialized as percentages.

[Sam Weinig]

Pull request: https://github.com/WebKit/WebKit/pull/74715

[EWS]

Committed 321758@main (921c2490e195): <https://commits.webkit.org/321758@main>

Reviewed commits have been landed. Closing PR #74715 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/188254602>