Patent ID: 7753965

Claim:
A hair dye composition, comprising a first part comprising an alkaline agent and a second part comprising an oxidizing agent, which are mixed together immediately before use, wherein at least one of the first part and the second part comprises a diazacycloheptane represented by the following general formula (1) or a salt thereof, and the pH after mixing is 7.5 to 12; wherein Z represents a hydroxy group, a primary amino group, or a C1 to C4 acyloxy group which may be branched; R 1 and R 2 are the same or different, and each represents a hydrogen atom or a C1 to C4 alkyl group which may be branched; and R 3 represents a hydrogen atom, a C1 to C6 acyclic or cyclic alkyl group which may be branched, a C1 to C6 acyclic or cyclic alkoxy group which may be branched, an aralkyl group having a total of 12 or less carbon atoms, which may be substituted with one or more C1 to C4 alkyl or alkoxy groups, or an aryl group having a total of 12 or less carbon atoms, which may be substituted with one or more C1 to C4 alkyl or alkoxy groups.