Use a purple shampoo or blue shampoo to neutralize yellow tones
Use a toner with a violet or ash base
Choose a hair dye labeled platinum blonde, silver, or ash blonde
Lighten the hair first if it is too dark
Apply a white or pastel hair dye over a very light base
Use a color-depositing conditioner for maintaining white tones
Avoid products with strong yellow or orange pigments
Wash hair with cool water to help preserve the tone
Use a clarifying shampoo before toning if there is product buildup
Consult a professional colorist for the cleanest white result