Um yeah, they are the exact same color (RGB 107 in Photoshop).
In Photoshop...square B is 107, 108, 114... Square A is 104, 105, 106, 107, 108, 109, 110...
Mostly overall though...it\'s 107. I was just speaking from the perspective or real life. Shadows can make things a different color. Sunlight can make things a different color. But that\'s not what the illusion is about. They don\'t look the same and that\'s just...trippy.
Thanks for the pic of the 3rd example. You pointed it out better than the site did. It\'s easier to compare when it\'s side by side.