Multi-stage dyeing process for keratinous fibers

The present application relates to a multi-stage process for dyeing keratinous fibers, in which - a first color-changing means (A) is applied to the fibers, - this after a contact (E1) is optionally rinsed out, - then a second color-changing agent (B) is applied to the fibers and - then the fibers after a contact time (E2) be thoroughly rinsed, wherein one of the agents (A) or (B) contains at least one natural dye and one of the two agents (A) or (B) at least one indole and / or indoline derivative contains. The process leads to intense colorations with a good gray coverage.