#K416 - 90/90cm

Inspired by an image in the 'Interaction of Color' book by Josef Albers, this painting is indeed an optical illusion.

After I managed to find the suitable spray cans matching the colors from the picture I transformed the design into a composition with a circle rather than a rectangle. The optical illusion is the perception that the purple parts to the left and the right in the circle appear to be two different hues. 

Putting this perception to the test I spray-painted the circumference of the circle to prove that it is undianably the same color.