I’m looking for a French kid’s or adolescent’s book. I read it in French class in middle school. It had watercolor illustrations and had to do with color. Maybe color leaving the world or being stolen? I think the main character was a boy with colorful wisps for hair. He was on a journey? I remember a villain, but I might be mixing up another book. It had a wide, white face and big eyes. Sorry, I know this might just not be enough!