Click on a thumbnail to view the test

*	Each of the tests above shows a number which is visible only for people with no color blindness. after you've decided about the number that you see, roll the cursor over the black square and see if you're right.
**	The tests are displayed here for fun and not as reliable source of diagnosting color-blindness, remember that the number of colors that can be displayed on the internet is much smaller than the number of true colors that surrounds us. if you can't see most of the tests right, maybe you should look for a book which has these kind of tests.