Paul Klee is an artist whose work has always captivated me. Recently reading a book on him, "Paul Klee Painting Music"by Hajo Duchting, I noticed this quote about colour:
"Colour was for Klee the 'imponderable' and thus individual element in the picture. ..... As Klee once commented: 'Colour has always had something secretive about it that is difficult to grasp. This mysterious quality penetrates the mind. The colours are the most irrational elements in painting. They possess something suggestive, a suggestive power."
Paul Klee, 'Fire in the Evening", l929, oil on cardboard.