function ColorPlugin() {
		throw("ColorPlugin cannot be instantiated.");
	}
The ColorPlugin enables tweening of almost any CSS color values. This includes 3 or 6 digit hex colors (`#00FF00`),
rgb, rgba, hsl, and hsla colors (but not named colors, such as `red`).

It can operate in either `rgb` or `hsl` mode. It will convert all colors into that mode, and output them accordingly.
@class ColorPlugin
@constructor