Feature-Request: Add OKLCH color format

[sebastian-marinescu]

As the CSS Color Module Level 4 specs have been implemented in the last years by all major browsers, we now have the awesome color-format "OKLCH". It will replace HSL in the long run, for sure.

Please make OKLCH also possible in Coloris.

[mdbassit]

I will look into it, but this is very low priority right now.
I'm planning a future rewrite of Coloris to make it more modular, I'll see if OKLCH can be added then.