Proportions of the human figure, the colour and the shape. This is the field the student enters in relation with by participation of his own body; this conditions an engaged approach to the choice of colours that express the resulting standpoint for the representation of space. In this case, colour is an adequate coefficient of the author's solution of the object/space relationship. The formulation of his own rule of completing the form with colour in the drawing of a figure. Human figure is for the student the canon of proportion, however by its richness of shapes it initiates, at the same time, considerations about a programmed use of colours. The method thus developed leads the student to the reasoning how to work with colours meaningfully and with view to the need of defending the result, since architecture is an applied art which has to serve to the defined needs of the client.