Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 921c2490e195807dffbd7ca2dd90ea9655131758
      
https://github.com/WebKit/WebKit/commit/921c2490e195807dffbd7ca2dd90ea9655131758
  Author: Sam Weinig <[email protected]>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

  Changed paths:
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-color-mix-function-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-hsl-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-hwb-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-none-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-powerless-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-relative-color-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-rgb-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-color-mix-function-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-hsl-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-hwb-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-relative-color-expected.txt
    M 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-rgb-expected.txt
    M Source/WebCore/platform/graphics/ColorModels.h
    M Source/WebCore/platform/graphics/ColorSerialization.cpp

  Log Message:
  -----------
  Update color serialization for sRGB/HSL/HWB
https://bugs.webkit.org/show_bug.cgi?id=324994

Reviewed by Tim Nguyen.

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, 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.

* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-color-mix-function-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-hsl-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-hwb-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-none-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-powerless-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-relative-color-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-computed-rgb-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-color-mix-function-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-hsl-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-hwb-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-relative-color-expected.txt:
* 
LayoutTests/imported/w3c/web-platform-tests/css/css-color/parsing/color-valid-rgb-expected.txt:
* Source/WebCore/platform/graphics/ColorModels.h:
    - Add Percentage type for components and adopt for HSL and HWB.
* Source/WebCore/platform/graphics/ColorSerialization.cpp:
    - Use new Percentage type in the model to serialize percentage components 
with trailing '%'.

Canonical link: https://commits.webkit.org/321758@main



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