$42.00, Amazon People with color-treated hair will appreciate this Paul Mitchell purple shampoo for helping to keep them out of the salon chair for a couple extra weeks in between appointments.

The Paul Mitchell Platinum Blonde Purple Shampoo is a shampoo perfect for color-treated and naturally light hair to ensure a gentle, safe way to eliminate brassiness.

You can see results in as little as one use. John Frieda Violet Crush Purple Shampoo The violet-tinted Paul Mitchell Platinum Blonde Shampoo (£16) helps condition hair and intensifies shine.