behind the z c

Sent to you by David via Google Reader:

Color tile optical illusion

You might have seen this shaded gray squares illusion before. Squares A and B are the same shade of gray.

Here's a similar illusion with colored squares. The "blue" tiles on the top face of the left cube are the same color as the "yellow" tiles in the top of the right cube.

Don't take my word for it. Use an image editing program with a eyedropper to see for yourself. I used Photoshop's eyedropper tool to take 5x5 samples and found that both the "yellow" and the "blue" tiles are C:50 M:40 Y:40 K:5.

Take a look at the brown tile in the center of the top face and the yellow tile in the center of the side facing slightly to the left. They're the same color. Link

Things you can do from here:

• Subscribe to Boing Boing using Google Reader
• Get started using Google Reader to easily keep up with all your favorite sites