At the Galerie Colette Allendy I exhibited some twenty monochrome surfaces, all in different colours: greens, reds, yellows, purples, blues, oranges.... and so found myself at the start of my career in this style... I was trying to show colour, but I realized at the private view that the public were prisoners of a preconceived point of view and that, confronted with all these surfaces of different colours, they responded far more to the inter-relationship of the different propositions, they reconstituted the elements of a decorative polychromy.

In 1956; p. 30 - "Yves Klein, 1928 – 1962, Selected Writings"