Blondes, decolorized, gray or brown hair with highlights can take on unwanted warm tones, such as yellow. To neutralize these unwanted tones, it is necessary to contrast them with pigments of opposite tones. The formula of L'Oréal Paris Color Vive Purple Anti-Hygienic Shampoo is enriched with purple pigments and UV filter, which instantly neutralizes unwanted warm tones and gently cleanses the hair. Also, check the PAO (Period After Opening) symbol that indicates the expiration time of the product after opening the package. The ingredient lists of L'Oréal Paris products are updated periodically, so read the list you will find on the product packaging to ensure that the ingredients are suitable for your personal use.