AG Hair Care Sterling Silver - Colour Care Sterling Silver is specially formulated to eliminate brassy, yellow tones from blonde and silver hair. With its unique violet base, this mild toning shampoo removes dullness and brassiness, leaving blonde and silver hair looking cleaner and brighter. pH 4.5-5.5. Use Massage into wet hair. Rinse and repeat as desired. Use once or twice a week for colour maintenance or more frequently to manage discolouration.