L’Oréal Pro Silver Shampoo; why your hair prefers it? Known for its relentless effectiveness, the Silver range from L’Oréal Professionnel remains the leading anti-yellowing hair product. Yellow tones and highlights disappear completely after just a few uses, much to the delight of blonde, white and gray hair. While the radical effectiveness of Silver hair care is no longer to be proven, these products also have the advantage of helping to soften the hair. The latter are then softer, more malleable and less dry. In short, Silver by L’Oréal is THE most loved blue shampoo.