The present invention relates to direct dyes of azomethine type of formula (I) below; and also to the use thereof for dyeing keratin fibers, in particular human keratin fibers such as the hair. The invention also relates to a composition for dyeing keratin fibers, comprising such direct dyes in a suitable dyeing medium. Similarly, a subject of the invention is a process for dyeing keratin fibers using the said dye composition, and also a device comprising the same. Finally, the present invention also relates to precursors of these direct dyes.