The present invention relates to novel cationic dye of formula (1) ##STR00001## wherein R.sub.1 and R.sub.7 are each independently of the other hydrogen, hydroxyl; unsubstituted or substituted C.sub.1 C.sub.6alkyl, aryl radical or C.sub.114 C.sub.6alkoxy; or --NR.sub.3R.sub.4, wherein R.sub.3 and R.sub.4 are each independently of the other hydrogen, unsubstituted or substituted aryl radical or C.sub.1 C.sub.6alkyl, and R.sub.2 is hydrogen, hydroxyl, unsubstituted or substituted C.sub.1 C.sub.6alkyl, aryl radical or C.sub.1 C.sub.6alkoxy, --NR.sub.3R.sub.4, or an organic radical of formula (2) ##STR00002## wherein R.sub.5 is hydrogen, unsubstituted or substituted aryl radical or C.sub.1 C.sub.6alkyl, and X.sup.- is an anion. Further, the present invention relates to compositions thereof, especially comprising other dyes, to processes for the preparation thereof and to the use thereof in the dyeing of organic material, such as keratin, wool, leather, silk, cellulose or polyamides, and preferably human hair.