Patent ID: 7892293

Claim:
A hair dye composition comprising the following components (a) and (b) and having a pH from 2 to 12 at the time of use: (a) 0.1 to 20% by mass of an aromatic sulfone compound represented by the following formula (1): wherein R's are identical or different, and each of them represents a hydrogen atom or a monovalent hydrocarbon group, or adjacent two R's are joined to form a saturated or unsaturated bivalent hydrocarbon group; when X is an oxygen atom, Y represents a hydrogen atom, and when X is a nitrogen atom, Y represents a carbonyl group that is bonded to X; and Z + represents a monovalent cation; and (b) 0.01 to 5% by mass of at least one component selected from the group consisting of glycylglycine, glycylglycylglycine and salts thereof.