Squares A & B are the same color !
Incredible isn’t it? :eek: :eek: :eek: 
Pilou
Yes, I love this image! It’s quite remarkable. Here’s another look at the color swatches involved, via Photoshop. Consider that any minor color discrepancy is due to jpg. compression.
Best,
Logicat
yeah, that is incredible
but if you squint your eyes, you can start to believe
but it’s still incredible
Well i did dought, forgive my foolish eyes but i’ve tested it myself & i’m amazed, befuddeld, astounded & gobsmacked! A Very nice optical illusion. 
very cool find Frenchy!