Rote Reaktivfarbstoff-Zusammensetzung

A reactive dye composition comprising a monoazo compound of the following formula (I) in the free acid form, (I) and at least one member selected from monoazo compounds of the following formulas (II) to (IV) in each free acid form, (II) (III) (IV) wherein Z, Z' and Z''' are each -CH=CH2 or -CH2CH2Z1, -CH2CH2Z2 or -CH2CH2Z3, respetively, in which Z1, Z2 and Z3 are each a group capable of being split by the action of an alkali, Z'' is -CH=CH2, and any one of X and Y is sulfo, and the other is hydrogen, exhibits superior dye performance such as solubility, storage stability and build-up property, and is useful for dyeing or printing fiber materials such as cellulose fiber in a red color excellent in various fastness properties.