Grumpy_Mike:
You can't charleyplexing RGB LEDs, try drawing the circuit and you find it won't work due to the three common connections on each LED.
No you can do this. It is possible with AS1119 or AS1130 LED driver (thought they are crossplexing which is an minor extension to charlieplexing it seems):
around 1:32 they put on a a 5x6 RGB matrix
or here: