Riva:
I'm with Crossroads in both caps per chip but minimum should be a 0.1uF per chip and maybe 10uF a pair.
Are you intending on driving both colours from same chip of different chip. Same seems possible but from different will probably be a headache.
Are you sure it's possible to drive both colors with same chip? How? If it's possible, I'd love to do it instead of using separate chip for each color...