I use purple shampoo, because I’m going gray. I’ve usually found it more drying than regular shampoo.
I have platinum hair….always have had. Mix any purple shampoo half and half with a regular shampoo. I use the generic brand from Sally’s and mix it with Dove. You just can’t get enough suds from the purple shampoos. I then use a purple conditioner. My hair never has a yellow tint.