A subject of the present disclosure is a cosmetic agent to lighten keratinous fibers containing—relative to its total weight—(A) from about 12.0 to about 23.0 wt. % potassium peroxodisulfate and(B) from about 10.0 to about 20.0 wt. % ammonium peroxodisulfate and(C) from about 5.0 to about 15.0 wt. % sodium peroxodisulfate.A second subject of the present disclosure is a method for lightening keratinous fibers, particularly red and/or reddish-blond keratinous fibers, wherein an agent of the first subject of the present disclosure is mixed with at least one additional component containing hydrogen peroxide and applied to the hair.