Patent ID: 7270684

Claim:
A composition for dyeing keratinous fibers comprising at least one direct dye chosen from compounds of formula (I): wherein: R 1 and R 2 are, independently of each other, chosen from: a hydrogen atom; and alkyl groups having from 1 to 30 carbon atoms, said alkyl groups optionally substituted with one or more hydroxy groups; R 3 is chosen from a hydrogen atom, alkyl groups having from 1 to 30 carbon atoms, and hydroxy groups; R 4 is chosen from a hydrogen atom and alkyl groups having from 1 to 30 carbon atoms; R 5 and R 6 , independently of each other, comprise alkyl groups having from 1 to 30 carbon atoms, or together with the nitrogen atom to which they are attached form a heterocycle; and A comprises an anionic counterion; wherein said at least one direct dye is present in an amount sufficient to dye keratinous fibers.