Manic Panic hair dye is the only way to evenly color the entire hair, and also the only way to disguise white or gray hair strands. In fact, if you have black hair (such as black or dark brown), this is the only way to tint it in a light color (such as gold or yellow) and bring out bright red or blue colors. However, Semi Permanent Hair Dye do last long, and you may need to carefully...