An agent for oxidatively dyeing keratin fibers includes in a cosmetic carrier, (A) as developer, 4,5-diamino-1-(2-hydroxyethyl)-1H-pyrazole and/or one of the physiologically acceptable salts thereof, (B) as developer, at least one pyrimidine derivative selected from 2,4,5,6-tetraaminopyrimidine, 4-hydroxy-2,5,6-triaminopyrimidine, 2-hydroxy-4,5,6-triaminopyrimidine and/or one of the physiologically acceptable salts thereof, (C) as coupler, at least one m-diaminobenzene derivative selected from 2-(2,4 -diaminophenoxy)ethanol, 1-methoxy-2-amino-4-(2′-hydroxyethylamino)benzene, 2,6-bis(2′-hydroxyethylamino)-1-methylbenzene, and/or one of the physiologically acceptable salts thereof, and (D) as coupler, at least one m-aminophenol derivative selected from 3-aminophenol, 5-amino-2-methylphenol and/or one of the physiologically acceptable salts thereof.
