The purple in this shampoo is acceptable on all hair colors, making it a good pick if your grays are just starting to grow in. Purple is opposite orange on the color wheel, so the purple color cancels out the brassy yellows and oranges in hair and brings the natural hair color back. Biolage shampoos are available for each hair type, need, and color. Avoid leaving purple shampoo on your hair for more than five minutes until you know how your hair reacts to it. If your hair does pick up some lavender tones, you can tone them down by washing with a clarifying shampoo. Find helpful customer reviews and review ratings for BIOLAGE Colorlast Purple Shampoo Neutralizes Brassy & Yellow Tones Paraben-Free For Color Treated Hair,, 33.8 Ounce at Amazon.com. Shampooing is the beginning of your hair care regimen, so you want to make sure you start on the right foot. A. How do purple shampoos counteract the yellow in gray hair? Biolage shampoo. If used improperly, purple shampoo can sometimes add lavender tones to light hair. Will purple shampoo turn my hair purple? Read honest … Biolage uses soybean oil to hydrate hair … all color can get brassy but not all hair colors react the same way to purple shampoos. Price: $$$ While originally designed for blonde hair, the Blonde Ale Brightening Shampoo is also great for gray and white locks. Q. A purple-pigmented product, this shampoo helps remove yellow … Whether it’s blonde, brown, or gray.