Are You Color Blind?

Color blindness - Wikipedia, the free encyclopedia

This image contains the number 37, but someone who is protanopic may not be able to see it:



This image shows a number 44 or 49, but someone who is deuteranopic may not be able to see it:



This image shows the number 56, but someone who is tritanopic may not be able to see it:



This image shows the number 83:



Ishihara color test - Wikipedia, the free encyclopedia

Example of an Ishihara color test plate. The numeral "74" should be clearly visible to viewers with normal color vision. Viewers with dichromat or anomalous trichromat may read it as "21", and viewers with achromat may see nothing:



An 1895 illustration of normal vision and various kinds of color blindness:




Тест на дальтонизм