Re: [w3ctag/design-reviews] CSS Color: lab(), lch() (#488)

In Chromium, Blink parses CSS color values into a 32-bit ARGB data type, which are eventually handed over to the Skia library to carry out the actual drawing (using its own 32-bit ARGB type).

Interestingly, Skia does support wider color gamuts (see ["Color Correct Skia"](https://skia.org/user/sample/color?cl=9919)) and many of its methods can optionally take high precision colors (four floats plus a color space).

The problem that I am working on at the moment is that very little code in Chromium uses Skia's high precision colors, and Blink does not use them at all. In other words, the code that actually draws Web pages uses 32-bit ARGB colors throughout.

As far as I could see, Chromium's support for wider gamuts seems limited to selecting a specific color profile (scRGB linear, P3, etc.) instead of the one specified by the operating system. There isn't support at the moment for using a wider color gamut for individual Web elements.

I'm still studying the code and doing experiments, looking for a path forward that could be tackled (or at least started) by a one-volunteer effort.

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