As obvious as it might seem, A and B
are the same colour, and you're still kidding yourself. You're kidding yourself about this picture, and you're kidding yourself about the yellow and grey on the first picture. Check out the echalk website yourself. Follow the illusion 2 link then it's illusion 1 to see the A and B squares image. Use the "swatch" to see for yourself that A and B really are the same.
eChalk: optical illusions
What's interesting about this is colour perception thing is that it demonstrates how people cling to what they
think is the truth. It's similar with time.
