Brunettes who lighten their hair through highlighting, balayage, and ombre can use purple shampoos to help counteract unwanted brassy tones. It can also be used on color-treated brunettes who are seeing their rich brunette turn into a coppery-warm, flat color. John Frieda Violet Crush Intense Shampoo was specially formulated to combat the stubborn yellow and orange tones that can occur in lightened blondes as well as brunettes who have lightened to blonde. For darker shades, it may require a longer leave on time or multiple uses to achieve the desired level of toning. Use our hair lightening tips to learn even more.