Disazo dyes with hydroxysulfonylnaphthalene coupling components

A diazo dye of the formula ##STR37## where m is 1 or 2,

• n is 0 or 1,
• Z.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.1 -C.sub.4 -alkyl substituted by phenyl, C.sub.1 -C.sub.4 -alkoxy or cyano,
• Z.sup.2 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkyl substituted by phenyl, C.sub.1 -C.sub.4 -alkoxy or cyano, C.sub.1 -C.sub.4 -alkanoyl, C.sub.1 -C.sub.4 -alkanoyl substituted by phenyl, C.sub.1 -C.sub.4 -alkoxy or cyano, benzoyl, benzoyl substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen or C.sub.1 -C.sub.4 -dialkylamino, C.sub.1 -C.sub.4 -alkylsulfonyl, phenylsulfonyl, phenylsulfonyl substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, halogen or C.sub.1 -C.sub.4 -dialkylamino, or a radical of the formula ##STR38## where Q.sup.1 and Q.sup.2 are identical or different and each is independently of the other halogen, amino, C.sub.1 -C.sub.4 -monoalkylamino, C.sub.1 -C.sub.4 -dialkylamino or phenylamino, and
• D is a thiazole or thiophene diazo component or a radical of the formula ##STR39## Y is hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkyl substituted by phenyl, C.sub.1 -C.sub.4 -alkoxy or cyano, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.6 -alkoxy substituted by phenyl, C.sub.1 -C.sub.4 -alkoxy or cyano, halogen or nitro,
• X is oxygen, imino or C.sub.1 -C.sub.4 -alkylimino,
• L is C.sub.1 -C.sub.6 -alkylene, and
• Q.sup.3 is a radical of the formula ##STR40## where R.sup.1, R.sup.2 and R.sup.3 are identical or different and each is independently of the others hydrogen, C.sub.1 -C.sub.4 -alkyl or benzyl, or R.sup.1 and R.sup.2 together with the nitrogen atom joining them together are pyrrolidinyl, piperidinyl, morpholinyl, piperazinyl, N-(C.sub.1 -C.sub.4 -alkyl) piperazinyl, imidazolyl, 3-(C.sub.1 -C.sub.4 -alkyl) imidazol-1-ylium or pyridinium group, and An.theta. is an anion.