A few ways to remove semi-permanent hair dye quickly is to shampoo the hair a few times with a strong shampoo, rinse with plenty of hot water or use a color remover product designed for semi-permanent hair dye. Shampooing the hair is useful because a semi-permanent hair dye, unlike a permanent dye, will fade after six to 12 shampoos.
A strong shampoo can include a clarifying or deep cleansing product. Shampooing the hair six to 10 times with these types of shampoos can fade the color. Utilizing hot water to rinse the hair can be useful because it helps to open the hair cuticle layer, which facilitates the removal of the unwanted hair color.
Another method is to buy a color remover product that is specifically made for the removal of semi-permanent hair color.