The L'Oreal Blondifier Shot Blue is an additive enriched with blue pigments. It has been developed to neutralize unwanted copper tones in the hair. The warm blonde hair will take on a cooler undertone. The red or orange glow in the hair will disappear. Always use the additive together with the L'Oreal Blondifier Masque! The L'Oreal Blondifier line has been developed for people with blond hair.