Agents for oxidatively changing the color of keratin fibers, comprising a complexing agent, an activator, and an oxidant

An agent for oxidatively changing the color of keratin fibers, the agent comprising:

• at least one complexing agent of general formula (I),
• wherein:
• R1 and R2, independently of one another, represent a carboxy-C1-C6 alkyl group or a physiologically acceptable salt thereof, a hydrogen atom, a C1-C6 alkyl group, or a hydroxy-C2-C6 alkyl group,
• m represents an integer from 0 to 6,
• n represents an integer from 0 to 6, and
• M1 and M2, independently of one another, represent a hydrogen atom or an equivalent of an alkali metal ion, an alkaline earth metal ion, a metal ion, or an ammonium ion (NH4+);
• and
• at least one activator that is a phosphoglyceride;
• and
• at least one oxidant.