The L'Oreal Professional Vitamino Color Spectrum Blue Neutralizing Shampoo is specifically formulated to combat unwanted brassy and yellow tones in color-treated hair, particularly beneficial for darker bases or cool-toned blonde shades. This essential hair care product works instantly to neutralize warmth, maintaining the vibrancy and cool reflection of your fresh salon color. Regular use helps extend the life and richness of your dye, leaving hair feeling conditioned and looking luminous.