Introduction

Look at Composition en rouge, jaune, bleu et noir (composition in red, yellow, blue and black). If you measure the shapes you will find interesting proportions.

• The big red square is half the height and width of the square of the picture frame.
• The black square is half the height and width of the red square.
• The white rectangles next to the black square are half its height and are like two squares put together.

The bottom and right sides of the red square are on the golden ratio of the painting (see Golden Ratio).