To get the yellow out of grey hair, use a clarifying shampoo when washing your hair. If that doesn't work, use a color-correcting shampoo with purple tones. Protect your hair from the elements.
- Use a clarifying shampoo
Clean your hair with a clarifying shampoo to remove debris and neutralize brassiness without depositing pigment, such as Joico K-Pak clarify chelating shampoo. Follow it with conditioner.
- Use a purple-tinted shampoo
Use a color-correcting shampoo with a purple tint to counteract the yellow tones, such as Pantene Pro-V Silver Expressions Daily Color Enhancing Shampoo and Conditioner or John Frieda Sheer Blonde Colour Renew Tone Correcting Shampoo and Conditioner.
- Protect your hair
Avoid using yellowish shampoos. Wear a hat in the sun. Install a water filter in your shower if the water is very chlorinated.