The present invention relates to a composition for dyeing keratin fibres, in particular keratin fibres such as the hair, comprising: a) at least one oxidation base 3-(2,5-diaminophenyl)-1-propanol acid salts thereof or solvates thereof such as hydrates； b) at least one heterocyclic oxidation base； c) at least one coupler； d) optionally at least one fatty substance； e) optionally at least one basifying agent； and f) optionally at least one chemical oxidizing agent. The invention also relates to a process for dyeing keratin fibres such as the hair using the composition of the invention, and to a multi-compartment device for using the composition of the invention.
