Highlights cool tones in blonde, silver, and platinum hair. The Platinum Shampoo uses a blue malva flower extract and behaves in a similar way to a traditional bluing agent. It covers unwanted yellow hues and makes gray hair appear brighter, shinier, and more silver in appearance. This color effect will become more pronounced with continued use. Conversely, if you no longer desire this effect, it is easily washed out with another shampoo.