Support for OKLCH color space

[neneodonkor]

There is a color space gaining traction in the digital world called OKLCH, which is an improvement of the older model LCH. It is already supported in CSS.

For example,

body {
    background-color: oklch(0.95 0.02 200);
}

I presume this can be implemented in MasterCSS this way: bg:oklch(0.95,0.02,200) or bg:oklch(0.95|0.02|200).

For more information on the subject:
https://evilmartians.com/chronicles/oklch-in-css-why-quit-rgb-hsl
https://oklch.com/#68.24,0.1151,71.54,100

[1aron]

Related to issue #346