ColorFilters do not support all data types for CSS colors that are defined by the CSS standard

[JustusGreiberORGADATA]

While working on #497 I noticed that the CSS standard allows additional data types as arguments, that are not supported by this library:

rgb/rgba:

• Parameters R, G and B and A are allowed to be <number>s, which means something like rgb(10.1, 11.2, 11.3, .4) (notice the missing number before the decimal point) should be allowed.
• Parameters R, G and B and A are allowed to be <percentage>s, which means something like rgb(10%, 10%, 20%, 40%) should be allowed

hls/hlsa:

• Parameter hue is allowed to be an <angle> so something like hls(1rad, 50%, 50%) should be allowed
  • angle can have one of the following units: deg, rad, grad, or turn
• Parameter alpha is allowed to be a <percentage>, which means something like hls(4, 50%, 50%, 50%) should be allowed.

See:

https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/hsl https://developer.mozilla.org/en-US/docs/Web/CSS/color_value/rgb https://developer.mozilla.org/en-US/docs/Web/CSS/number https://developer.mozilla.org/en-US/docs/Web/CSS/percentage https://developer.mozilla.org/en-US/docs/Web/CSS/angle

[hishamco]

We need to work one this after the related PR has been merged