A one-part hair dye composition containing (A) one or more compounds represented by the formula (1), (B) a silicone, and (C) a polyol, wherein the composition has a pH of from 8 to 11, wherein, a broken line represents the presence or absence of À bond, R 1 represents OH or acetoxy, R 2 represents H, - COOR (R representing H, CH 3 or C 2 H 5 ) or -COO - X + (X + representing a cation), and R 3 represents H, acetyl, CH 3 or C 2 H 5 .
