User blog comment:Sim0ns11/Lucy's hair color/@comment-32364324-20171206214930/@comment-31753089-20171207161456

You're right, I done more research and hair and skin color genes can even skip generations, so she could have gotten them from Harriet. However, it is true that real 3-year olds wouldn't want to dye their hair, but all the kids in the show are smarter, so I don't see why Lucy couldn't have wanted it by the age of 3.