The article explores the role of colour in architectural drawing. Its use can serve various purposes, such as emphasising the character of the object drawn, symbolically separating its function, or distinguishing it with colour from its surroundings. A meticulously observed and depicted building conveys through its colour not only information about the materials and pigments used, but also a wealth of impressions dependent on the light in which the drawing was made. It therefore also gives an idea of the weather at the specifi c moment, which may be linked to the prevailing conditions in a particular location, and thus to the colour schemes used in the design. On the other hand, accurately rendered colours, which depend on the specific atmosphere, allow one to accurately interpret the colour scheme of the building. It is important to bear in mind colour saturation, which is linked to the nature of the colours being examined and the intensity with which light affects the surroundings at the specifi c moment. Another key factor in this situation is the colour temperature of the light, which affects the building being drawn. As the colour temperature of the light changes, the colours change too. It is essential to note these changes in order to describe the situation.