The trees are blooming, the temperatures are rising and the sun is finally shining—bring on the warmth...unless it’s in your hair! The sun, hard water and even touching up your color too often can strip blue pigments from the hair, causing it to take on an orangey or yellow tinge. The easy fix: Many colorists recommend using a "violet" shampoo (like Pantene Pro-V Silver Expressions Shampoo, $5, Walmart.com) twice a week to help replace the lost pigments and neutralize the warm tones. But here's a trick to banishing brass in a flash—and it doesn't require buying a new shampoo!—from celebrity colorist Mike Petrizzi of De Berardinis Salon in New York City:
1. Combine 2 drops of blue food coloring, 1 drop of green and 1 drop of red to create violet.
2. Pour 12 to 18 oz. of your regular shampoo into a mixing bowl, add two or three drops of violet food coloring and mix well. For smaller bottles, add one drop at a time until you achieve the right level of color. "Ideally you want the shampoo to look like a light, pearlescent violet," says Petrizzi.
3. Use the DIY violet shampoo twice a week (or as you notice your hair becoming too yellow or orange) for beautiful rich brass-free color!