Reactive dye mixtures

A dye mixture including two or more compounds of the formula (I)

• A-D-(B)a—Y—(B)b-D-A (I)
• where D is a chromophore of the formula
• 32
• where the second sulfonic acid group of the naphthalene core is present on position 5 or 6, preferably position 6, the A radicals are each a chromophoric group which is attached to D via an azo group, the bridging group Y is a radical of the formulae III, IV, V or VI
• 33
• a C2-C4-alkylene group, which optionally comprises 1, 2 or 3 NR4 or O heteroatoms and which is optionally substituted by 1 or 2 OH or COOH groups, R4 being H or C1-C4-alkyl,
• a C1-C4-alkylene group comprising at least one C3-C7-cycloalkelene group (optionally substituted by one or two C1-C4-alkyl groups), a phenylene group (optionally substituted by one or two C1-C4-alkyl and/or SO3H groups) and/or a nonaromatic 5- or 6-membered heterocyclic group having one or two nitrogen heteroatoms, or
• a C3-C7-cycloalkylene group,
• where Y can also be a chemical bond when one of the indices a or b is 0 and the other is 1,
• o and p are independently 1, 2 or 3,
• Q is N or CH,
• q is from 0 to 10 subject to the proviso that q cannot be 0 or 1 when Q is N,
• R1, R2 and R3 are independently selected from the group consisting of H, C1-4-alkyl, hydroxy-C1-4-alkyl and amino-C1-4-alkyl,
• B is
• 34
• where
• X is chlorine or optionally substituted pyridinium,
• or including at least one compound of the formula I and at least one compound of the formula Ia
• A-D-B—Y—H (Ia)
• where A, D, B and Y are each as defined above,
• wherein the compound of the formula I and Ia can also be included in the form of a salt.