Purple shampoo is a specific type of shampoo for hair, intended exclusively for washing blonde, dyed hair. It is also known by the name anti-yellow, which depicts its primary purpose - neutralizing unwanted yellow tones on blonde hair. The term purple shampoo comes from its colour, as it is enriched with purple pigment that acts on yellow and orange tones by lightening and softening them, giving the hair a "cool", grayish glow. Read all about purple shampoo on the blog.