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.
Purple shampoo works the same way to eliminate brassiness on brown hair as it does on blonde. It helps to prevent color fade, while emphasizing shine, keeping brown hair vibrant and rich. Using purple shampoo on brown hair regularly will take out any unwanted warm tones in your strands.
Blue shampoos are designed to counteract orange tones in brunette hair, while purple shampoos are used to banish brass in blonde hair. If you make the leap from brunette to blonde hair, make sure to switch to a purple shampoo to counteract the yellow tones that often appear in color-treated blonde hair.
Generally, you won't need to use purple shampoo every day. You can use it one to two times per week in place of your regular shampoo or once you start to notice brassiness creeping in.
If you have brown hair, you need a blue shampoo. Blue shampoo won't turn your hair blue. But what it can do is help fight the stubborn brassy, orange tones that can make brunette hair lose its luster.
If anything, purple shampoo may make your hair temporarily slightly darker. This is because the inky purple pigments found in purple shampoo are a darker color than the shades of yellow in blonde hair.
When you get your hair professionally colored at the salon, hairstylists often tone hair to neutralize brassy yellow and orange tones on bleached hair. Purple shampoo is a great at-home solution for toning hair and preventing brassiness.
If you have naturally blond hair that's often being put through any of the aforementioned processes, it may be in your best interest to use a purple shampoo, but Toth noted that you shouldn't use it too often since "it can dry out your hair, make gray hair purple, and dull your shine" if overused.
Blue is the opposite of orange, so a blue shampoo will cut through the brassiness in lightened brunette hair and restore it to a cool or neutral tone.
If you have dark hair
In fact, there are many color-depositing shampoo formulas that are specifically made to enhance the already deep color, as well as tone the hair, especially if you're looking to neutralize any unwanted warmth or brassiness from highlights and/or coloring.
Yes you can use vivid Bright Red on darker color treated hair & the result will be less vibrant. On brown hair with highlights you will get more vibrant results. Vivid Bright Red can last as long as you want with continued use. Vivids take more time to wash out of the hair.
Adding a green shampoo to your brunette hair will add a lasting freshness to your color, and help increase the longevity of your color. Green Shampoo, just like purple shampoo, refers to the color of the product and its neutralizing capabilities, and is essentially an at-home, in-shower toner.