First, the basics — what is blue shampoo? "Blue shampoo contains blue-violet pigments that are deposited into the hair when you shampoo," explains Jamielynn De Leon, owner of Rogue House Salon ...

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

Whether you're a redhead, blonde or brunette, if you colour your hair, chances are you'd like your new shade to stay put—particularly if you've spent a small fortune at the salon. If you're ...