Chrome-complex dyes and the production and use thereof

A chrome-complex dye which, in the form of the free acid, corresponds to the formula ##STR151## wherein X is a direct bond or the radical of an aliphatic or aromatic diamine, W is hydrogen or a lower alkyl group, or the two W's taken together are an aliphatic bridge having 2 C atoms, each R.sub.1 is a low-molecular alkyl group, an aryl group or the CN--CH.sub.2 group, the A's independently of one another are each a radical of the benzene or naphthalene series, the B's independently of one another are each a radical of the benzene or naphthalene series, the Z's independently of one another are each a nitrogen atom or a CH group, the p's independently of one another are each 1 or 2, the q's independently of one another are each 1 or 2, the Y's independently of one another are each an oxygen atom or a group of the formula --NR--, wherein R is hydrogen or low-molecular alkyl, and when Z is a CH group, Y has to be an oxygen atom and the D's independently of one another are each the radical of an o-hydroxyaldehyde, or, when Z is a nitrogen atom, they are each the radical of a coupling component coupling in the o-position with respect to Y, and n is an integer from 1 to 8 inclusive.