User blog comment:Sim0ns11/Lucy's hair color/@comment-35267485-20171207204053/@comment-31753089-20171207231623

I thought so, too. However, it wouldn't fit with the symmetry, which is often used in the show: 6 sisters would be blondes and 4 sisters would be brunettes.

However, I think if she was brown-haired, the other brunettes would certainly have found, or tried to find, a new look for her which fit with brown hair before making her blonde, don't you think? But they didn't. They found three looks for her still black-haired (which didn't fit), and then they made her blonde.

For this reason, I guess Lucy isn't brown-haired, so: - Lucy's natural hair color could be black; her sisters didn't find a look which fit with it, so they decided to dye her hair blond/give her a blonde wig. - Lucy's natural hair color could be blond; her sisters just restored it.