A la centaurea bio anti-yellow shampoo for grey and blonde hair Klorane. We selected organic Knapweed for its content of cyanocenta, a plant-based pigment with bluish tones traditionally used to give una shine to white or gray hair. The organic anti-yellow shampoo formula of Klorane Knapweed gives fine hair a fresh tone. Soft and easy to comb, it reveals the hair's true beauty and splendor.