L'Oréal Paris - Violet Deyellowing Shampoo - For Blonde, Bleached, Highlighted or White Hair - Neutralization of Yellow & Orange Reflections - Elseve Color-Vive - 200 ml

I use it once a week to maintain my blonde highlights, I let it sit for a few minutes so it doesn't turn too grey, then I shampoo it again.

The shampoo is used to avoid unwanted red, orange and yellow tones on dyed or naturally blonde hair. The shampoo has a strong purple colour, it cleans gently and tones the hair; use should be continuous – the more you use it, the better the results, meaning the more you use it, the fewer orange tone… Read more

Very good, it's the best I've tried so far, I will buy again.

In my case, it’s very noticeable that it tones blond hair and removes orange tones. The only downside is that, at least for me, it dries out my hair quite a bit, so I recommend using it together with a very hydrating mask.