Colors are not interpreted correctly

[SidneyNemzer]

Keywords
CSS has hundreds of color keywords, but CSSStyle only recognizes a few
https://github.com/chad3814/CSSStyleDeclaration/blob/master/lib/parsers.js#L100-L116

HSL and HSLA
CSSStyle has no logic to interpret HSL or HSLA values. Here's the regex for Hex, RGA, and RGBA. HSL and HSLA are missing.

https://github.com/chad3814/CSSStyleDeclaration/blob/master/lib/parsers.js#L28-L30

Computing the result
Hex values are correctly converted to RGB, however keywords (even valid ones) are not. If CSSStyle intends to emulate a browser's behavior, it should convert everything to RGB or RGBA

TLDR
CSSStyle doesn't handle color values correctly

[FagnerMartinsBrack]

This is causing an issue with JSDOM.

[PavelPZ]

... and all its dependencies, as JEST, REACT-TESTING-LIBRARY etc.
Is PR welcomed? Can I fix parsers.js?

[bennypowers]

This breaks lighthouse tests: