Dark brown hair can be lightened by a few shades using hair lightening dyes made for home use. Lightening dark brown hair to light blonde shades necessitates the services of a professional colorist.
By law, home hair coloring preparations can only be formulated with a maximum of 6 percent hydrogen peroxide, which is the lightening agent. Consumers may use them to lighten dark brown or black hair to medium brown shades simply by following the manufacturer's directions.
Lighter shades, including the brightest platinum blondes, can be achieved by a professional colorist using salon products. However, even this often has to be done in stages a few shades at a time to minimize the damage to the hair.