The circular area in each quadrant in both figure is exactly the same color. See how your phone displays it. Picture copyright by University of York at http://www.yorku.ca/



The round dots are all exactly the same color gray. See how your phone displays it, but your eyes might fool you. Picture copyright by University of York at http://www.yorku.ca/



See how your phone displays ouchi pattern. Look carefully your eyes might trick you again. Picture copyright by University of York at http://www.yorku.ca/



See how your phone displays gray scale. Original picture copyright by University of York at http://www.yorku.ca/



The smallest gray squares in this image are the same shade of gray. Picture copyright by http://www.extremetech.com/



See how colors work on your display. Picture copyright by http://www.projectcool.com/



See how brown color work on your display. Picture copyright by http://www.projectcool.com/