PROBLEM TO BE SOLVED: To provide a dyeing agent that has good fastness properties with respect to washing, light, shampooing and rubbing, and a hair dyeing composition that preferably exhibits satisfactory stability under oxidoreduction conditions.SOLUTION: A hair dyeing composition comprises, for example, a compound represented by formula (5) and formula (6) as a main component.【課題】洗浄、光、シャンプー及び摩擦に対して良好な堅牢特性を有している染色剤、好ましくは酸化還元条件下で十分な安定性を呈する、毛髪染色用組成物の提供。【解決手段】例えば、式(5)及び式(6)で表される化合物を主成分として含有する毛髪染色用組成物。【選択図】なし