A treatment shampoo for hair color that shines today, tomorrow and in a month | Enjoy 100 days of brilliant colors that do not suffer from time. Thanks to its ferulic and citric acid content, the shampoo for colored hair L’Oréal Professionnel Serie Expert Vitamino Color Spectrum Shampoo manages to fix the pigments deep into the hair fiber, leaving the hair tone as fascinating as on the day of dyeing. It also adds high brilliance, saturation and contrasts unwanted reflections, making the color stand out in all its intensity.