After seeing this grayish dartboard below, and being a regular fan of Might Optical Illusions blog, the question arises almost spontaneously – Do the light and dark regions, as indicated by the arrows, appear to be different? Which region is actually darker? Believe it or not, they are identical! Errrm…Well, at least they should be! Please bear in mind that the picture you see below was first scanned and then uploaded by the person who sent it to me, so they might not actually be the same. Still, in the end it might help the illusion to work even better! As it might turn out that the darker region is the one that appears lighter at the first glance! You be the judge…
