An oxidative dyeing composition comprising (A) a 1-hexyl/heptyl-4,5-diaminopyrazole compound of the general formula (I), its physiologically compatible water-soluble salt, or mixtures thereof (B) a benzene-1,3-diol compound of the general formula (II), its physiologically compatible water-soluble salt, or mixtures thereof, and (C) an oxidizing agent. wherein R1, R2, R3, R4, R5, R6 and R7 are as defined herein and a=1 or 2.