I've used a demi permanent color in dark brown that came out almost black and didn't like it at all. I tried many natural remedies to remove the color but all they did was to dry out my hair. Three months later without applying any color I had new hair growth showing and because decided to go back to my natural brown hair I bought this. Like it says on the package,I really tried to not touch the new natural hair but of course it did :(. The dark brown-black hair came out a medium-dark orange red and my natural hair was bright light orange-yellow. I mixed it with 20% developer and left it on for about an hour. Prior to the dark brown demi color I had some clear henna in my hair also and maybe that's why this product didn't do much for the dark area. Used a deep protein treatment the day before and another one the day after because got a little "gummy" after the process. At least didn't damage it very badly...