Purple shampoo on brown hair primarily works to neutralize unwanted warm tones such as yellow, orange, and brassy hues, especially in lightened or color- treated brown hair like balayage, ombré, or highlights
. The purple pigment in the shampoo counteracts these warm tones because purple is opposite yellow on the color wheel, so it cancels out yellowish brassiness, helping to maintain a cooler, more neutral hair color
. Key effects of purple shampoo on brown hair include:
- Reducing brassiness and warm undertones that can develop from color fading, sun exposure, or environmental factors
- Enhancing the vibrancy and shine of lighter sections or highlights within brown hair, making them look fresher and cooler-toned
- Acting as a gentle toner that deposits purple pigment without lightening or darkening the hair itself
However, purple shampoo is most effective on medium to light brown hair or brown hair with lightened sections. On very dark brown hair, it may have little visible effect
. Overuse can sometimes leave a slight purple tint if left on too long or used excessively
. It is generally recommended to use purple shampoo once or twice a week, focusing on lighter areas, and to follow product instructions to avoid over- toning
. In summary, purple shampoo helps maintain a cooler, less brassy tone in brown hair, especially when it has been lightened or highlighted, by neutralizing yellow and orange hues and enhancing shine without altering the natural hair color depth
