Scrustle said:
Out of my personal collection (from this gen.) I'd recommend Darksiders (the sequel appears to be even more colourful), Oblivion, KoA: Reckoning, El Shaddai, The Darkness 2 (obviously pretty dark but it has strong colours too), Mirror's Edge, Zelda: Skyward Sword, and Muramasa. If you want racing games I guess the Forza games are pretty colourful too, especially Forza 3. Forza 4 is still colourful but they toned it down a bit from Forza 3. It was a bit intense. Forza 2 wasn't really colourful though. It hasn't aged that well. It looks pretty rough and dull now. Test Drive Unlimited 2 has very strong colours as well.
*Looks at avatar*
I'm amazed you resisted mentioning it. XD
Well, I guess you were talking about this gen. But hey, there is a Wii Version of Okami. :3
OT: Okami is one of the most colorful and uniquely presented games out there. It really is like playing through a series of paintings and wood carvings. And it's a fun, well-written game overall with a lot of content, with the only flaw being that it's incredibly easy. I recommend it whole-heartedly.
http://www.youtube.com/watch?v=7QcQGuamkUA