That fan-made lightsaber fight reminded me. Above are, as far as I know, the only canonically acceptable ones. Along with a couple from the original KOTOR (I still haven't played the sequel) and the novels, I don't know if those are strictly kosher, but of course that just depends on who you ask. Frankly I thought the way there were no new colours (except for Samuel L. Jackson's, and that's only because he specifically asked for one, or so he says) in the prequels was one of the crappy things about them.
Personally, I like yellow and orange. I think it's orange for me by a hair. I'd also like one of those bendy duelist hilts like Dooku's, if I wanted a fancy hilt.