The present invention relates to a composition for dyeing keratin fibers, comprising, in a medium that is suitable for dyeing keratin fibers: at least one oxidation base chosen from 4,5-diaminopyrazole, pyrazolopyrimidine and diamino-N,N-dihydropyrazolone heterocyclic bases, and at least one coupler chosen from the compounds of formula (II) and the addition salts thereof, solvates thereof and solvates of the salts thereof: The composition of the present invention makes it possible in particular to obtain colorations in varied shades, which are strong, chromatic, powerful, aesthetic, sparingly selective and resistant to the various attacking factors to which the hair may be subjected.
