Punky Colour Semi-Permanent Conditioning Hair Color

I tried to use it twice to touch up my already blue hair that had started to get a little lighter. First time I left it on for 20 mins then rinsed it out. It was only a little bit darker but went right back to the same light blue it was after 1 shampoo wash. Next day I left it on for an hour and it did the exact same thing. I have thick long hair and was only able to get 2 uses out of it

Best hair dye I’ve ever used. Totally recommend it .