Hahaha, yeah… The first time I saw the image it was a bit hard to believe, because I mean, we are actually seeing those are 2 different colors…
Once I researched why we see what we see, it makes sense.
Bottom line is we can’t trust what we see.
To see the “true” color of the squares, paint is enough. Just select it and move them side by side…
Or, use a color picking tool in any image editor and the color code will be the same.
There is another one that’s quite good:
Is she rotating to the left?, to the right?, both sides?.
Your brain is going to tell tou she is rotating clockwise because of conditioning watching dances where the leg follows the rotation of the body. If someone say this that had no experience with that, they would see a different perspective.