Color blindness is a condition in which certain colors cannot be distinguished, and is most commonly due to an inherited condition.
Try this app and see if you may be color bind. This app is based on the Ishihara Color Test. The Ishihara Color Test is a test for red-green color deficiencies. The test consists of a number of colored plates, called Ishihara plates, each of which contain a circle of dots appearing randomized in color and size. Within the pattern are dots which form a number visible to those with normal color vision and invisible, or difficult to see, for those with a red-green color vision defect.
This app is intended for informational purposes.