LO does seem to be a bit more colorful and vibrant compared to the FPS type games that I've played that also use UE3. The overall plot and story are more mature though, so it is still more subdued compared to other rpgs.
Not really a fair comparison, but my gf has been playing Tales of Destiny (Director's Cut) on my PS2 and the colors/palette/everything in that game is so much more vibrant and everything compared to LO. I know they are completely different, but it does make the scheme used in LO stand apart compared to typical rpgs. Both BD and ES are the same in this regard, compared to LO.
I need to finish LO, still on the 4th disc. :-o
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"
