i dont think it works on black, because my friend uses these (but in a different color) and it does not look very vibrant and her hair is just a dark brown, but i could be wrong maybe that color (i think it is some shade of blue?) is meant to look washed out like that?
Why do you say Hannah Montana Hair Color Sticks, plural? Just wondering. Is there, like, more than one or is it just because on the packaging it refers to itself in plural? Thanks :)