بلسم للشعر الطبيعي والملون (فضي) Davines Alchemic Conditioner

I have tried the blue MoroccanOil, the blue Kerasta (or whatever it's called), and this one. Only this product works on my ash blonde hair. It lasts for 2-3 hair washes (because you only need to wash the scalp, not the length, for it to hold). It creates a pleasant cool tone. However, if you don't distribute it properly (which can happen when you're not used to it yet), you might end up with blue patches that will give you a slightly eccentric look :)

I have only used the mask from the series without the shampoo. It really gives a cool shade, even to severely yellowed blond hair. However, the effect only lasts until the next hair wash (if you don't use it every time, and you won't because it does dry out the hair, although they do become softer than just using blonde shampoo). Overall, I'm satisfied and plan to order more after I finish the current jar (the usage is quite economical, but my hair is just below shoulder length).