[Webkit-unassigned] [Bug 255939] (OK)LCH implementation is not according to spec

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=255939

--- Comment #10 from Karl Dubost <karlcow at apple.com> ---

> If the lightness of a Lab color (after clamping) is 0%, or 100% the color will be displayed as black, or white, respectively due to gamut mapping to the display.

and

> If the chroma of an LCH color is 0%, the hue component is powerless. If the lightness of an LCH color (after clamping) is 0%, or 100%, the color will be displayed as black, or white, respectively due to gamut mapping to the display.
https://drafts.csswg.org/css-color-4/#specifying-lab-lch


> If the lightness of an Oklab color is 0% or 0, or 100% or 1.0, the color will be displayed as black, or white, respectively due to gamut mapping to the display.
https://drafts.csswg.org/css-color-4/#specifying-oklab-oklch

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