Purple shampoo for silvery hair. Silver Savior Shampoo busts brassiness and keeps blonde, silver, white or lavender shades fresh and bright. Powerful purple pigments tone and cool, provitamin B5 softens and plumps and wheat proteins strengthen and thicken. Here’s a tip: you can even use Silver Savior Shampoo to tone after a lightening treatment — that’s how potent it is.