Improved tinting shampoos

An agent is disclosed for the dyeing of keratinic fibers, in particular human hair, comprising; (a) at least one direct-acting dye, (b) at least one amphoteric surfactant, in particular at least one alkyl betaine, and (c) at least one alkyl polyglycoside, in particular at least one alkyl polyglucoside, wherein the weight-related total amount of amphoteric surfactant (b) in the agent, based on the total weight of the agent, is less than or equal to the weight-related total amount of alkyl polyglycoside (c). Also disclosed is the use of said agent for increasing at least one of the properties of chromaticity, colour lift and colour intensity of direct-acting dyes on keratinic fibers. Further disclosed is a method of colouring keratinic fibers in which the said agent is applied to keratinic fibers.