>Manic Panic< is one of the biggest and most known hair dyes for unnatural hair colors. In Sweden, most professional hair stylists use this brand to dye their clients hair. I'm not sure if all their stuff is vegan (they also have quite a lot of makeup) but they write on their website that they guarantee all their hair dyes and vegan and PPD (p-Phenylenediamine) free.
I've always wanted blue hair but I never want to bleach my hair. I have a darker brownish hair color, and here are my results after using MP on unbleached hair.
In conclusion, I'm really happy with the results. First of all, it doesn't damage your hair AT ALL. It's like a hair repair mask and I usually have the color in for at least 5 hours before rinsing it in cold water. Secondly, the color stays really long, especially for me who doesn't wash my hair with shampoo etc very often. Last time I colored my hair I probably had 5-10 cm of outgrowth hair in my natural color but the rest of the hair still looked really good.
Do you have any favorite hair dye brands?