Abstract: Use of anthraquinone dyes and of fluorescent dyes for dyeing keratin fibres, dyeing process and composition. The present invention relates to a process for dyeing keratin fibres, in particular human keratin fibres such as the hair, using a) one or more particular anthraquinone dyes and b) one or more fluorescent direct dyes; to a composition comprising a) and b). The present invention also relates to a multi-compartment device containing the compounds defined above.

Abstract: The invention relates to the dyeing of human keratin fibres, especially the hair, using cationic direct dyes bearing a particular sulf(on)ate, carboxylate, or phosph(on)ate counterion of formula (I) in which formula (I) Col(?)m, X?, m and n are as defined in the description. The invention relates to a dye composition comprising a cationic dye of formula (I), and to a process for dyeing keratin fibres such as the hair, using the said composition. Similarly, the invention relates to novel cationic compounds of formula (I) and to the uses thereof for dyeing keratin fibres. This composition makes it possible to obtain chromatic, powerful and particularly fast coloration on keratin fibres and particularly lightening coloration via an optical effect on dark hair.