Composition (I) comprises: at least 25% of fatty substance； one or more oxidation bases comprising diaminopyrazolone or its addition salts with an acid； one or more additional dye precursors different from the oxidation base； one or more oxidizing agents； and optionally one or more alkaline agents. Independent claims are included for: multi-compartment device comprising: a first compartment containing a composition comprising one or more fatty substances, a second compartment comprising diaminopyrazolone oxidation bases, one or more dye precursors and one or more alkaline agents and a third compartment comprising one or more oxidizing agents, where the third compartment contains a portion of fatty substance, diaminopyrazolone oxidation bases, fatty substance, dye precursors, oxidizing agents and alkaline agents； a first compartment containing a composition comprising one or more fatty substance, and one or more oxidants and a second compartment comprising diaminopyrazolone oxidation bases, the dye precursors and alkaline agents, or diaminopyrazolone oxidation bases, fatty substance, dye precursor, oxidizing agent and alkaline agents； or a first compartment containing a composition comprising one or more fatty substance, diaminopyrazolone oxidation bases, additional dye precursors and alkaline agent and a second compartment containing one or more oxidizing agents, diaminopyrazolone oxidation bases, fatty substance, dye precursor, oxidizing agent and alkaline agent.
