Yeah, I hope the anime pulls a Kuma on Inazuma so that he doesn't look like a creamsicle. Speaking of Kuma, I was not a fan of orange Kuma. Luckily Oda recently changed his track suit to navy-blue, closer to the anime's black.
I wasn't fond of the Guardian Beasts' colors either. They look plenty silly already, and the LSD-inspired coloring does not help.
Other than those, I'm overall pretty satisfied with Oda's colorings, though I do think he could stand to use some darker colors a little more often. There are some things that initially strike me as looking funny, like Camie's sea-weed green hair (expected blond), or Marguerite's blond (expected silver or white due to her flower name), but I usually get used to them. I like how the anime colors in characters' eyes every now and then, as opposed to Oda leaving them brown in the few times he colors them at all.