As for how to use a purple shampoo, for best results, allow it to sit for three to five minutes before rinsing to fully penetrate the hair. Our experts suggest swapping one in for your regular shampoo once every few weeks, or when you want to brighten your shade or minimize brassiness or yellowing. How often should you use a purple shampoo?įirst, you don't want to use a purple shampoo every day. Violet-tinged formulas “work best on blondes that prefer a more cool or neutral tone,” O’Connor says, but they're also great for light brown, silver or highlighted hair. They can also help keep blonde strands from losing their shine. Since purple is yellow's opposite, when you wash your hair with a purple shampoo, it lessens any appearance of yellow or orange brassiness.
Purple shampoos deposit a sheer violet tint on strands that helps cancel unwanted yellow or brassy tones according to color theory: “Shades sitting opposite one another on the color wheel, called complementary colors, neutralize each other,” explains Good Housekeeping Institute Beauty Lab Director Birnur Aral, Ph.D.
What is purple shampoo good for and what happens when you use it? This is where a purple toning shampoo can help.
This yellow or orange cast can be caused by a number of things, including "your color oxidizing over time, exposure to UV light, chlorine and even traces of copper in your water,” explains Meri Kate O’Connor, celebrity colorist at Loft 647 in West Hollywood, California. Blondes in particular may notice signs of brassiness over time. The challenge? Maintaining that just-left-the-salon level luster until your next dye job. When it comes to hair, there’s nothing better than fresh color.
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