RGB light!

I know it's been suggested before, but RGB light.

Right now there are already 2 "colors" of light with their own intensity, Sky light and block light, just make it 3 RGB (or maybe I dont understand why skylight HAS to be its own thing so RGB&skylight). I Think  it would be so cool for not only various colors of light along with brightness, but something I haven't seen before is the consideration of refraction w/ transparent blocks like glass and water only letting a certain light or a certain amount of a certain light color through. It would look so cool, especially with RTX being a thing now. You could just have the standard glowstone or whatever "white" light source behind some glass and POW its 100% more awesome!