After the two-year time skip, Zoro and Robin came back lighter skinned. I would have thought nothing of it, but after searching for "fishman racism" on Google, I ran into an article on Oda's racism towards "ethnic" people. One Piece is my favorite anime and I watch it a lot, so I don't take any "white washing" argument lightly. I don't even want to think of Oda as having racial bias, but I won't ignore the facts.
The article discusses different aspects of One Piece that can lead one to believe that the show has some racist undertones, but I won't go into detail about the article. The story about racism in One Piece mentions that Oda did tell the animators to change certain things concerned with the two-year time skip, and two of the dark-skinned characters came back way lighter. Is Oda racist? I don't know but I can't say he isn't, as the article had valid and reasonable points to prove that he at least has a racial bias.
Then after reading the article above, I am sitting around thinking about it from time to time. So was it actually white washed or did these changes happen for some other reason?