CSS4 - Specifying profiled colors: the color() function (original) (raw)
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Afaik this differs from #2864, which primarily requests color-mod().
This is intended for 'CSS Color Module Level 4' color(), allowing to specify profiled colors.
Spec: https://drafts.csswg.org/css-color/#color-function
Example:
em { color: color(p3 50 250 100); }
Shamelessly stolen from https://developer.apple.com/library/prerelease/content/releasenotes/General/WhatsNewInSafari/Articles/Safari_10_1.html
Safari 10.1 (& TP) / iOS 10.3 support this, apparently.