Diaminopyrazole derivatives and oxidation hair dyes containing pyrazolone derivatives

The object of the present Invention are agents for oxidatively dyeing hair, which contain certain diaminopyrazole derivatives as developer substance and certain pyazolone derivatives as coupler substance. The object of the invention is an agent for oxidatively dyeing keratin fibers, wherein it contains (a) at least one 4,5-diaminopyrazole derivative of Formula (I), (II) or (III) or its salt with organic or inorganic acids, as well as(b) at least one pyrazol-5-one derivative of the general formula (IV), (V) or (VI), or its salt with organic or inorganic acids,