PROBLEM TO BE SOLVED: To provide a composition for the dyeing of keratin fibers, in particular, human keratin fibers, such as the hair, which enables coloration in various shades that is powerful, chromatic and aesthetic, with low selectivity and with excellent resistance to aggressive factors to which the hair is likely to be subjected, such as shampoos, the light, sweat and permanent shaping.SOLUTION: There are disclosed herein a composition for the dyeing of keratin fibers comprising at least one 3-amino pyrazolo-[1,5-a]-pyridine derivative or one of its addition salts, and a method of employing this derivative. [Zis O； and R, R, R, Rand Rare alkyl groups or the like.]【課題】多様な色合いで、強力、有色、美的、低選択性であり、毛髪が受ける可能性の高い攻撃的因子(例えばシャンプー、光、汗及びパーマ整髪)への優れた耐性を備えた着色を可能にする、ケラチン線維、特に人間のケラチン線維(例えば、毛髪)の染色の為の組成物の提供。【解決手段】少なくとも1つの3-アミノピラゾロ-[1,5-a]-ピリジン誘導体又はその付加塩のうちの1つを含むケラチン線維を染色するための組成物。この誘導体を使用する方法。［Ｚ１はＯ、Ｒ１，Ｒ２，Ｒ３，Ｒ４，Ｒ５はアルキル基など］【選択図】なし
