It even works to get rid of unwanted yellow tones in natural gray or silver hair. Ahead, the best purple shampoos for the job, including a highly-rated Amazon pick, a budget-friendly option at Walmart (hello, under $12), a salon-quality shampoo at Ulta, and a few you can even pick up at your local drugstore. Now people use it to just brighten up their blonde if you’re a natural blonde you can use. Here is a two-minute before and after: Here is my hair after using BUniq for five minutes after washing with this Midnight Shine Charcoal clarifying Shampoo.. Brighter, white and ashy looks can be achieved by leaving it on longer but I worry about a purple tinge because it is so strong. If you need to cut out a lot of brassiness, use a comb to work your purple shampoo through your dry hair before you get in the shower. To properly use purple shampoo, coat your hair from root to end, and let it sit. When I use it I only have to leave it on for two minutes to see noticeable results. If you’ve never used a purple shampoo before, they’re great for grey or lightened hair that has turned brassy or yellow. The purple shampoo challenge is the newest social media trend doing the rounds. Leave it on up to 20 minutes and then wash out and follow with conditioner as usual. Amika’s products boast a common time-saving thread: high-end dryers and blowout sprays truly reviewed and proven to reduce drying time, dry shampoos that save us from days of a new hair wash and style, and even fast-acting color correctors like a purple blonde-toning shampoo. Grab Fanola off Amazon Here. Purple shampoo is used to tone down the yellowness the brassiness in your hair. To get why the tinted product is so crucial to hair color maintenance, you first have to understand brassiness. Ahead, everything you need to know about how to use purple shampoo.. What is purple shampoo good for? Fanola purple shampoo can be bought pretty much anywhere – Amazon, Ulta, or even Walmart! Originally it was created for people with gray or platinum hair. (For best results, supplement your go-to shampoo with a purple shampoo once a week, then build up as needed.) Using a purple toning shampoo is a key step in keeping your hair color looking fresh, vibrant, and like you just left the salon.