Compsns. for oxidn. dyeing of keratinic fibres, esp. human hair, contain at least one developer; at least one 4-hydroxyindole coupler of formula (I); and at least one heterocyclic coupler selected from indoles of formula (II), benzimidazole derivs. of formula (III), benzomorpholines of formula (IV), pyridines of formula (V), 6-hydroxy-, 6-amino-, or 5,6-dihydroxy-indoline, quinoline derivs. of formula (VI), sesamol derivs. of formula (VII), and their acid-addn. salts. R1 = H or 1-4C alkyl; R2, R3 = H, 1-4C alkyl, COOH or 2-5C alkoxycarbonyl; X = H, halo, 1-4C alkyl, 1-18C alkoxy or acetylamino; R4, R5 = H or 1-4C alkyl; R6 = H, 1-4C alkyl or OH; Y = OH or NHR7; R7 = H, 1-4C alkyl or 1-4C hydroxyalkyl; provided that (a) when R6 = OH it is in the 6 position, Y = 5-OH and R4, R5 = H; (b) when Y = OH it is in position 6 or 7 and R6 is not OH; and (c) when Y = NH2 it is in position 4, 6 or 7; R8 = H or 1-4C alkyl; R9 = H, 1-4C alkyl or phenyl; R10 = OH, NH2 or OMe; R11 = H, OH, OMe or 1-4C alkyl; provided that (a) R10 is in the 4 position when it = NH2; (b) R11 is in the 7 position when R10 is in the 4 position; and (c) R11 is in the 6 position when R10 is in the 5 position; R12, R13 = H or 1-4C alkyl; Z = OH or NH2; R14 = H, OH, 1-4C alkoxy, 1-4C monohydroxyalkyl, 2-4C polyhydroxyalkyl, NH2 or OCH2CH2COCH2CH2OH; R15, R17 = H, OH, NH2 or 1-4C alkyl; but must be NH2 when R14 = polyhydroxyalkyl or OCH2CH2COCH2CH2OH; R16 = H or 1-4C alkyl; R18 = H, OH, 1-4C alkoxy, 1-4C monohydroxyalkyl, 2-4C polyhydroxyalkyl or NH2; provided that cpds. (V) do not contain more than two NH2 gps. or more than two OH gps. or more than one NH2 gp. and one OH gp., and that these NH2 and/or OH gps. must be meta to each other; R19 = OH or 1-4C alkoxy; R20 = H or NH2; R21 = OH or NH2; R22 = halo or 1-4C alkoxy.
Keratinous fibers oxidation dyeing composition comprising an oxidation base, an indolic coupler and an additional heterocyclic coupler and dyeing process