When bleaching hair, it should be clean. By this, we mean that it should be free from masks, gels, coating, and other heavy hair products. The same goes when toning hair. Your hair should be free from other hair products when applying the toner. Otherwise, the toner will not penetrate the hair fiber. It will fail to neutralize the yellow tint. You can’t just use any toner in the market. To neutralize yellow tones on your hair, you need the purple toner. This brings us to the color wheel.