“1,024 Colours in 4 Permutations'
In order to represent all extant colour shades in one painting, I worked out a system which – starting from the three primaries, plus grey – made possible a continual subdivision (differentiation) through equal gradations. 4 x 4 = 16 x 4 = 64 x 4 = 256 x 4 = 1,024. The multiplier 4 was necessary because I wanted to keep the image size, the square size and the number of squares in a constant proportion to each other. To use more than 1,024 tones (4,096, for instance) seemed pointless, since the difference between one shade and the next would no longer have been detectable.
The arrangement of the colours on the squares was done by a random process, to obtain a diffuse, undifferentiated overall effect, combined with stimulating detail. The rigid grid precludes the generation of figurations, although with an effort these can be detected. This aspect of artificial naturalism fascinates me – as does the fact that, if I had painted all the possible permutations, light would have taken more than 400 billion years to travel from the first painting to the last. I wanted to paint four large, colourful pictures.”

Richter's quote from the catalog of a group exhibition in 'Palais des Beaux-Arts', Brussels, 1974
1970's