[consulting] On Visual Design Challenges, or Can you make it darker than that?

[Jeff Greenberg]

The squares are the same color. Both squares are the same color of gray. 
Test them in a drawing program. The eye adjusts to the surrounding 
colors...the increased shadowing in the surrounding squares and the 
perceived contrast cause the optical illusion.


pwriter at zunzone.com wrote:

> Thanks Matt.  At first I thought they where saying 'squares' where the 
> same color (wrong), but the A & B are the same color.  There is no 
> text explaining the 'thing'.
> Patrick

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