The purpose of the present invention is to solve the problem, in powder hair dye compositions that contain a percarbonate, that a change occurs in the dyed color tone before and after storage when the composition contains metaaminophenol, 5-aminoorthocresol, resorcin, or a salt thereof, as an oxidation dye. To solve the aforementioned problem, a powder hair dye composition containing (A) a percarbonate, (B) a starch, and (C) an oxidation dye is provided, characterized in that the composition contains at least 7 mass% starch (B) and in that the oxidation dye (C) contains at least one selected from metaaminophenol, 5-aminoorthocresol, resorcin, and salts thereof. Thus, a powder hair dye composition can be obtained which suppresses change in the dye color tone before and after storage and which has excellent storage stability.本發明所欲解決之課題如下:於含有過碳酸鹽的粉末毛髮染色劑組成物之中,作為氧化染料而言,若含有間氨基苯酚、5-氨基鄰甲酚、間苯二酚及這些的鹽,在儲存前後毛髮染色色調會產生變化。為解決上述課題,本發明提供一種粉末毛髮染色劑組成物,係於含有(A)過碳酸鹽、(B)澱粉及(C)氧化染料之粉末毛髮染色劑組成物之中,含有7質量%以上的前述(B)澱粉;前述(C)氧化染料係含有間氨基苯酚、5-氨基鄰甲酚、間苯二酚及這些的鹽中所選擇至少1種以上。藉由該粉末毛髮染色劑組成物,可獲得儲存前後中之毛髮染色色調的變化被抑制、儲存穩定性優異之粉末毛髮染色劑組成物。