A reactive dye of the formula ##STR1## or of the formula ##STR2## or of the formula ##STR3## in which D, D.sub.1 and D.sub.2 are each phenylene or naphthylene unsubstituted or substituted by alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, carboxylic acylamino having 1 to 8 carbon atoms, amino, alkylamino having 1 to 4 carbon atoms, phenylamino, N,N-di-.beta.-hydroxyethylamino, N,N-di-.beta.-sulfatoethylamino, sulfobenzylamino, N,N-disulfobenzylamino, alkoxycarbonyl having 1 to 4 carbon atoms in the alkoxy radical, alkylsulfonyl having 1 to 4 carbon atoms, trifluoromethyl, nitro, cyano, halogen, carbamoyl, N-alkylcarbamoyl having 1 to 4 carbon atoms in the alkyl radical, sulfamoyl N-alkylsulfamoyl having 1 to 4 carbon atoms, N-(.beta.-hydroxyethyl)-sulfamoyl, N,N-di-(.beta.-hydroxyethyl)-sulfamoyl, N-phenylsulfamoyl, ureido hydroxyl, carboxyl, sulfomethyl, or sulfo, R.sub.1 is hydrogen or C.sub.1-4 -alkyl unsubstituted or substituted by halogen, hydroxyl, cyano, C.sub.1-4 -alkoxy, methoxycarbonyl, ethoxycarbonyl, sulfamoyl, sulfato, carboxyl or sulfo, R.sub.2 is (1) hydrogen, (2) alkyl unsubstituted or substituted by halogen, hydroxy, cyano, alkoxy, methoxycarbonyl, ethoxycarbonyl, sulfamoyl, sulferto, carboxy or sulfo, (3) cyclohexyl, (4) phenyl unsubstituted or substituted by methyl, ethyl, methoxy, ethoxy, chlorine, bromine, carboxyl, sulfo or sulfomethyl, or (5) a radical of the formula --alk--SO.sub.2 --Z, E--NH.sub.2, --CH.sub.3, --NH--CO--NH.sub.2, --NH--CO--CH.sub.3 or --NH--CO--CH.sub.2 --OH, wherein alk is C.sub.2-6 --alkylene, Y is --SO.sub.2 --Z, --SO.sub.2 --N(R.sub.1)--Z, --N--(R.sub.1)--SO.sub.2 --Z, --N(R.sub.1)--CO--(CH.sub.2).sub.3-5 SO.sub.2 --Z, --SO.sub.2 --F, --SO.sub.2 CH.sub.2 --CH.dbd.CH.sub.2, --N(R.sub.1)--CO--CBr.dbd.CH.sub.2, --N(R.sub.1)--CO--CHBr--CH.sub.2 Br, --N(R.sub.1)--CO--CCl.dbd.CH.sub.2, --N(R.sub.1)--CO--CHCl--CH.sub.2 Cl, --N(R.sub.1)--CO--CH.sub.2 Cl or --N(R.sub.1)--CO--CH.dbd.CH.sub.2, Z is --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 --A, A is --OSO.sub.3 H, --SSO.sub.3 H, --OCOCH.sub.3, --OPO.sub.3 H.sub.2, --Cl, --Br or --F, and X is fluorine, chlorine or hydroxyl.