People with gray hair may start to notice that their hair will start to yellow. For a quick fix, you can wash your hair with blue- or purple-tinted shampoos -- these shampoos will tone down the yellow tones in your hair. Although this method works, it's not only not a permanent solution, but these shampoos can be a little pricey. Instead, you can use a hydrogen peroxide hair bleach to rid your hair of the yellow tones for weeks at a time.
Squirt 1/8 cup of your hair conditioner into a small bowl.
Add 1/8 cup of 30-volume hydrogen peroxide to the small bowl.
Stir the conditioner and peroxide together well using a spoon.
Apply the mixture to your hair, combing it through to ensure it's evenly distributed.
Fit a plastic hair cap over all your hair, and leave the mixture on your hair for 20 minutes.
Rinse your hair out, then shampoo and condition your hair as usual.
Prevent your gray hair from yellowing by avoiding chlorine and hard water.