What is blue shampoo?

Blue shampoo is a type of toning shampoo that is specifically designed to neutralize brassy or yellow tones in blonde, gray, white or highlighted hair. It gets its blue color from the added blue pigment that helps to balance out the yellow tones in the hair. This type of shampoo is usually recommended for those with cool-toned hair colors, as it can help maintain the hair's natural coloring and prevent discoloration. Blue shampoos are also capable of adding shine and elasticity to the hair, making it look and feel healthier. However, it is worth noting that overuse of blue shampoo can give the hair a bluish tint, so it is important to use it in moderation and follow the recommended usage instructions.