Composition, comprises: (a) at least 25% of one or more fatty substance comprising fatty amides and esters of fatty acids； (b) one or more dye precursors； (c) one or more oxidizing agents； and optionally (d) one or more alkaline agents. Independent claims are included for: (1) dyeing keratin fibers, comprising applying a composition to the keratin fibers for a sufficient time to develop the desired coloration； and (2) multi-compartment device comprising: a first compartment which contains a composition comprising one or more esters and/or fatty amides associated optionally with other additional fatty substance, second compartment containing the dye precursor and optional alkaline agents； and a third compartment containing one or more oxidizing agents, where the third compartment may contain a portion of fatty substance, dye precursors, or oxidizing agents and optionally alkaline agents； or a first compartment containing a composition comprising fatty esters or and/or fatty amides optionally combined with optionally other additional fatty substances and one or more oxidants, and a second compartment containing one or more dye precursors and the optional alkaline agents, or fatty substance derived from amides and/or esters of fatty acids, dye precursors, oxidizing agents or optional alkaline agents； or a first compartment containing a composition comprising one or more fatty substance, or dye precursors and optional alkaline agents, and a second compartment containing one or more oxidizing agents or fatty substance derived from amides and/or esters of fatty acids, or dye precursors, or oxidizing agents or optional alkaline agents.
