[css-color-5] Consider using the same identifiers for color-adjust() and relative color syntax #6142
Description
As I realize they are kind of competing with each other, I think it would make it a bit easier to compare color-adjust() (https://drafts.csswg.org/css-color-5/#coloradjust) and relative color syntax (https://drafts.csswg.org/css-color-5/#relative-colors) if they used the same keywords for color channels.
For example, color-adjust() uses red, green, and blue, while relative color syntax uses r, g', and b`.
I think using the more verbose but clear keywords from color-adjust() would be preferable, but consistency either way would be nice.