All Our Hair Color Products Manic Panictish Snookys Manic panichair dye is a semi permanent, vegan hair dye that comes in all kinds of vibrant colors. before applying it, make sure that your hair is light enough to pick up the color by bleaching it if necessary. use a tint brush to spread. My hair is medium brown, and i could not get good results without bleaching. the only other thing that may work is to put some "sun-in" or hydrogen peroxide on the area that he wants to dye to make the hair more porous, then later put the manic panic onwith a plastic bag and how to manic panic dark hair heatmuch longer than the advised time. Another video in the "does it work on dark hair" series!! i got a ton, a ton of comments requesting manic panic so i definitely needed to try this on my unbleached dark hair. to add a bit of a. Manic panic hair dye is a semi permanent, vegan hair dye that comes in all kinds of vibrant colors. before applying it, make sure that your h...