Yes, decorative LEDs are allowed on competition robots (we had them last year and plan to this year).
I can't seem to find those parts on the Andy Mark website, but IIRC, I saw these last year and they're using the WS281x RGB LEDs which are the same as used in the Adafruit NeoPixel strips.
You can see my, and other, replies in this thread for more info.
Please ask any more questions if you have them!
http://www.chiefdelphi.com/forums/sh...hreadid=132355