A dispensing system has a dispenser for delivering a variable colour mixture, and a computer system having a touch screen on which the mixture colour can be displayed, and a selection movable on the screen, to vary the dispensed mixture colour. A method for learning to use such a dispensing system having a dispenser allows a colour mixture to be dispensed, and a computer system, making it possible to select a colour and to memorize data, including: selecting at least one colour with the aid of a computer system interface, delivering, with the aid of the dispenser, at least one selected colour mixture, evaluating the one or more dispensed mixtures after application to at least one face zone, memorizing the at least one mixture characteristics, in particular a mixture that the user wishes to be able to recover, and of at least one zone on which it has been tested.