The present invention relates to a process for dyeing keratin fibers, in particular human keratin fibers, such as hair, using one or more specific azinium dyes and one or more fluorescent dyes. The present invention also relates to a cosmetic composition comprising a dye as defined above and also to a multi-compartment device containing said dye. The present invention also relates to the use of bright keratin fibers, in particular human keratin fibers, such as hair, for example, chestnut-brown, dark chestnut-brown, brown, shiny brown or To the use of said dyes to dye even black.
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