Hair dyeing process using a composition comprising at least one indol(in)e compound and a polycyclic aromatic compound containing at least ten carbon atoms

A dyeing composition comprising

• i) at least one indole or indoline compound;
• ii) at least one aromatic compound comprising a hydrocarbon-based polycycle comprising at least 10 carbon atoms, wherein at least one ring is aromatic and substituted with at least one hydroxyl or amino group;
• optionally, iii) at least one metal salt chosen from transition metal salts, rare-earth metal salts, or mixtures thereof, or at least one natural ortho-diphenol;
• optionally iv) hydrogen peroxide or at least one hydrogen peroxide generating system;
• and
• optionally v) at least one basifying agent.

A kit for dyeing keratin fibers, comprising at least 2 compartments and at least 2 compositions, the compositions comprising:

• i) at least one indole or indoline compound;
• ii) at least one aromatic compound comprising a hydrocarbon-based polycycle comprising at least 10 carbon atoms, wherein at least one ring is aromatic and substituted with at least one hydroxyl or amino group;
• optionally iii) at least one metal salt;
• optionally iv) hydrogen peroxide or at least one hydrogen peroxide-generating system;
• and
• optionally v) at least one basifying agent.