Composition comprises at least one cationic compound comprising 4-aza-1-azoniabicyclo[2.2.2]octane compounds (I). Composition, useful for coloring and optionally simultaneous lightening of keratin fibers, preferably human hair, comprises at least one cationic compound comprising 4-aza-1-azoniabicyclo[2.2.2]octane compounds of formula (I). A : optionally substituted heterocyclic or carboxylic uncharged ring R1-R3 : H, 1-6C alkyl, 2-6C alkenyl, 1-6C alkoxy, Cl, Br, I, F, hydroxy, amino, carboxy, 1-6C alkylamino, 1-6C dialkylamino, nitro, nitrite, hydroxy 1-6C alkoxy or acylamino group m, n : 1-6 and X ->monovalent anion preferably halide, hydrogen sulfate, p-benzenesulfonate, p-toluenesulfonate, acetate, tetrafluoroborate, trifluoromethanesulfonate, hexafluorophosphate or methanesulfate.
