form has a definite effect on color - it can nullify or strengthen the effect of color. I read Kandinsky's 'Concerning the Spiritual in Art' sometime after I painted these paintings. I had yet apparently been in accord with the color theory, namely that keen colors are well suited by sharp forms, e.g. a yellow triangle - it is hard to see from the reproduction below, but there is a sharp yellow lighthouse in the shape of a triangle towards the lower middle right hand side. And soft deep colors are suited by round forms, such as a blue circle. 

I painted the blue circle as a representation of absolute truth, life in its absolute perfect and harmonious form - a perfect circle. The below reproduction is cropped on both the left and the right sides, in reality the circle falls in the middle of the canvas, but raised, almost floating, but suspended, in a static state.

"...brief concentration will reveal in the yellow a spreading movement out from the centre, and a noticeable approach to the spectator. The blue, on the other hand, moves in upon itself, like a snail retreating into its shell, and draws away from the spectator. [W. Kandinsky]"