Present invention relates to a composition for oxidative colouring hair based on oxidative dye precursors and coupling substances further comprises at least one branched fatty alcohol, at least one non-ionic emulsifier and at least one compound according to the formulawherein R1 is an saturated or unsaturated alkyl chain having 11 to 23 C atoms, R2 and R3 are the same of different an alkyl chain having 1 to 4 C atoms and n is a number between 1 and 4 and/or its salts.
