Chromatic Adaptation demo

I found a super cool chromatic Adaptation demo. You can test your eyes' chromatic adaptation here.

http://www11.tok2.com/home/yoshih/color_demo.html.

In the middle of the page where you see two colors, yellow on the left and blue on the right and a little circle in the center, gaze the little circle for a while, then put the mouse over the area. It's amazing you can see the picture naturally.