Brightening colorant with indolythiazolium dyes

Agent for the simultaneous brightening and dyeing of keratin fibers, characterized in that it contains a) at least one oxidant and b) at least one indolylthiazoliumazo dye of formula (I) and that c) it has a basic pH

• wherein
• R1 stands for a saturated or unsaturated (C1-C12)-alkyl group, a halogen atom-substituted (C1-C12)-alkyl group, a hydroxy-(C1-C12)-alkyl group, a (C1-C6)-alkoxy-(C1-C12)-alkyl group, an amino-(C1-C12)-alkyl group, a (C1-C6)-alkylamino-(C1-C12)-alkyl group, a di(C1-C6)-alkyl-amino-(C1-C12)-alkyl group, a cyano-(C1-C12)-alkyl group, a substituted or unsubstituted phenyl group or a substituted or unsubstituted benzyl group;
• R2 and R3 can be equal or different and independently of each other stand for hydrogen, a halogen atom, a saturated or unsaturated (C1-C12)-alkyl group, a (C1-C12)-alkoxy group, a nitro group, an amino group, a (C1-C12)-alkylamino group, a di(C1-C12)-alkylamino group, a (C1-C12)-hydroxyalkylamino group, a di(C1-C12)-hydroxyalkylamino group, a sub-stituted or unsubstituted phenyl group or a substituted or unsubstituted heteroaryl group;
• R4 stands for a saturated or unsaturated (C1-C12)-alkyl group, a halogen atom-substituted (C1-C12)-alkyl group, a hydroxy-(C1-C12)-group, a (C1-C6)-alkoxy-(C1-C12)-alkyl group, an amino-(C1-C12)-alkyl group, a (C1-C6)-alkylamino-(C1-C12)-alkyl group, a di(C1-C6)-alkyl-amino-(C1-C12)-alkyl group, a cyano-(C1-C12)-alkyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted benzyl group or a substituted or unsub-situted heteroaryl group;
• R5 stands for hydrogen, a saturated (C1-C12)-alkyl group, a substituted or unsubstituted phenyl group or a C(O)O-(C1-C12)-alkyl group;
• R6, R7, R8 and R9 can be equal or different and independently of each other stand for hydrogen, a halogen atom, a saturated or unsaturated (C1-C12)-alkyl group, a hydroxyl group, a (C1-C12)-alkoxy group, a nitro group, an amino group, a (C1-C12)-alkylamino group or a di(C1-C12)-alkylamino group;
• and
• A− stands for an anion of an organic or inorganic acid.