As for this invention, cosmetics media, (i) includes the ashirupirijiniumu derivative and the hydroxy basic content ammonium compound of 1 where it is shown with (iii) formula (ii) genera which at least the oxidizer of 1 genera, (ii) is shown at least with formula (i) of 1 genera at least, it regards the means in order the light coloring to do the keratin fiber.本発明は、化粧品媒体が、(i)少なくとも1種の酸化剤、(ii)少なくとも1種の式(I)で示されるアシルピリジニウム誘導体および(iii)式(II)で示される少なくとも1種のヒドロキシ基含有アンモニウム化合物を含む、ケラチン繊維を明色化するための手段に関する。