Space and colour
Colour, and how it interacts with space, was a vital part of Constant’s work and philosophy. To read more, see the text Voor een spatiaal colorisme (For a spatial colorism), written by Constant and architect Aldo van Eyck. Colour, to Constant, was a material.
In the beginning of the 1950’s, Constant started to work with coloured plexiglass, which was a very modern material. It became the key to working with the spatiality of colour. See, for example, Constructie met gekleurde vlakken (Construction with Coloured Planes).
Constant wrote many texts in his lifetime. About his writing, however, opinions differ. Stokvis reads aloud the beginning from the Manifesto, which she finds to be bellowing. Van Halem, however, sees a talent for putting ideas into words, which, Van Halem says, Constant succesfully utilized within the Cobra group.