Welcome to European Tribune. It's gone a bit quiet around here these days, but it's still going.
Colour is weird. One of my favourite illusions:

The 'yellow' and 'brown' center tiles are the same colour.

There's also Adelson's checker illusion:

A & B are the same colour.

by ThatBritGuy (thatbritguy (at) googlemail.com) on Fri Apr 23rd, 2010 at 07:35:49 PM EST
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