The present invention relates to particular cationic paraphenylenediamine compounds of formula (I) below and also to the use thereof for dyeing keratin fibres, in particular human keratin fibres such as the hair. The invention also relates to a dye composition comprising, in a suitable dyeing medium, one or more cationic para-phenylenediamines as defined previously. Finally, the invention relates to a dyeing device using the said composition.
