The article "Colour in spatial design" explores how colour is used in art and design, focusing on its relationship with space. The researchers discuss the physical nature of colour, different ways to mix colours, and the use of colour contrasts. They also examine how artists in painting, sculpture, and architecture incorporate colour into their work. The researchers conducted practical work with elementary school students, allowing them to explore the connection between colour and space through making models. The students gained new experiences and insights into how colour can impact spatial design.