(Sorry if post duplicated - original seems to have evaporated).
Daughter (14) desperate for blue hair over summer. I allowed (although I think it looks awful, but that's beside the point) on proviso that she stopped dying it mid August to allow a few weeks for it to wash out before school. She used non-permanent 6-10 wash-out (brand is Colour Freedom).
It's still looking rather blue :-0 with not long before school starts.
Have I made a terrible mistake?...her hair is naturally very blond...Will it be permanently stained?....she looks like a surf at the moment.
Google's come up with a product called Colour B4 which I might invest in (£10!!!)...