Are those two dots the same color?

Try to drag the above rectangle blocks down (with mouse drag and drop)
and check out the color for those two dots again. Are they the same now?

translate strings in simulation to different language format before download
Full screen applet or Problem viewing java?Add to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(945.3kB):double click downloaded file to run it. (7 times by 6 users) , Download EJS source View EJS source

The Chubb illusion is an optical illusion wherein the apparent contrast of an object varies dramatically, depending on the context of the presentation. Low-contrast texture surrounded by a uniform field appears to have higher contrast than when it is surrounded by high-contrast texture. This was observed and documented by Charles Chubb and colleagues in 1989