User blog comment:Aphrodite Sweetheart/Official Winx Club WOW and 4th movie discussion blog/@comment-24027341-20160804144807/@comment-26569404-20160804224430

Again with the "whitewashing" thing? I thought this screenshot made it obvious what's going on here. Rainbow didn't lighten Aisha and Flora. They lightened the whole show!

It looks like the colors are desaturated, and that has more of an effect on darker skin than lighter skin. Rainbow said WoW would have "more adult graphics." Brighter colors look more kiddy and cartoony than dull colors, so that's probably why they did this.