Multiple videos uploaded under the hashtags see brunettes applying purple ... bottle of shampoo for no reason. Those with brunette hair will see a much bigger difference in using blue shampoo.

The best shampoos for gray hair are actually purple shampoos. Here’s what experts want you to know about using one, plus we rounded up the best options.

Although the shampoo and conditioner reduced brassiness to an extent, I found that the build-up of the purple pigment made it a product that I wouldn't want to use every wash. Instead, I'm keeping ...

Unlike your regular shampoo, purple shampoo is a specialized formula crafted to neutralize unwanted yellow undertones in ...