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 .本發明的一劑式染毛劑組成物，係含有：(A)：式(1)所示化合物之1種或2種以上、(B)：聚矽氧類、及(C)：多元醇，且pH8~11。〔式中，虛線係指有存在或未存在π鍵；R1係指OH或乙醯氧基；R2係指H、－COOR(R係H、CH3或C2H5)、或－COO－X＋(X＋係陽離子)；R3係指氫原子、乙醯基、CH3或C2H5〕。
