This is one of the best picture illusion I ever saw. I bet you won't believe your eyes. This is not any joke.
In the above picture the square A and the square B are of the same colors.
Can't beleive??
Just open the picture in any image editor and compare it's color. You will see those two are same color.
See the picture below. I made a rectangle of same color joining these two squares.
No sign of difference in color. Amazing no????
This is an illusion to our eyes.