PRO:VOKE Touch Of Silver Brightening Shampoo is the original purple shampoo and from the #1 purple brand in the UK. This toning treatment shampoo brightens coloured, natural or highlighted platinum, blonde, white and grey hair, resulting in vibrant, dazzling shine. For visibly brighter hair after just one wash. Specially formulated with both violet and blue pigments to intensely neutralise brassy, yellow tones and treat colour fading and dullness for instant, visible results.