While we wish the instructions were a bit clearer on how long to leave on the product ... t been impressed when using purple shampoos on her naturally red hair in the past, this colorist ...

Color-depositing shampoos add specific pigments (either purple, blue or green) onto the hair shaft to maintain your desired color. Based on color theory, blondes should use purple shampoos ...

"If you leave a purple shampoo on for too long, your hair will have a blue-purple tinge to it," Irwin cautions. Never exceed the specific product instructions and if you do choose to leave it on a ...

Andie MacDowell's secret for maintaining her vibrant and voluminous gray locks is in this under-$20 L'Oréal Paris purple ...