Sayu is the first Sub leader to have black hair while in the group
Risa - Brown/Blonde/Dark Brown
Ai - Blonde/Freaking every shade of Brown
Miki - Brown/ Dark brown
Yossie- Blonde/Brown/Dark brown
Mari - Blonde/ Brown, Dark Brown
Kei - Dark brown ( I don't think her hair was a light brown when she was in Musume
?)