There are several ways to get rid of brassy tones in hair. One of the best ways is to use purple shampoo, which can be found at many beauty stores. It is applied like regular shampoo and can be very effective at diminishing brassy tones after just a few uses
Brassy tones are yellow-orange, so they can be counteracted by their opposite shades on the color wheel, which are blue-purple tones. Another great trick is to mix some baking soda with a little hydrogen peroxide. Apply this paste to hair, let sit for 15 minutes and rinse thoroughly. Brassiness can also be prevented in the first place by mixing some purple or blue toner with the hair dye.