Composition for the oxidation dyeing of keratinous fibres, comprising a para-phenylenediamine derivative and a 6-hydroxy-1, 4-benzomorpholine and dyeing process using such a composition

An oxidation dyeing composition for keratinous fibres, the composition comprising, in a medium appropriate for dyeing, at least one oxidation dye precursor and at least one coupler,

• wherein said composition contains, as said at least one oxidation dye precursor, a para-phenylenediamine of the following formula (I):
• ##STR7## in which m is an integer equal to zero, and n is an integer from 1 to 4 or an acid addition salt of said para-phenylenediamine, and
• wherein said composition further contains, as said at least one coupling agent, a 6-hydroxy-1,4-benzomorpholine of the following formula (II):
• ##STR8## in which the radicals R.sub.1 and R.sub.2 are the same or different and denote a hydrogen atom or an alkyl radical containing 1 to 4 carbon atoms or an acid addition salt of said benzomorpholine, said at least one oxidation dye precursor and said at least one coupler being present in amounts effective to dye keratinous fibres.