How to Tell if You're Colorblind

1). Visit the Color Vision Testing website for a free online color blind test. This site will help you determine if you are colorblind and the severity of the color deficiency, although this should not be the ultimate diagnosis.
2). Read the questions on the online test and view the pictures. These tests are a series of pictures with multiple colors and patterns popping out through a background of another color. Check the answer key to see if you found all the shapes and patterns.
3). Make notes of any answers you answered incorrectly. These may be colors that you are unable to see.
4). Consult your doctor for an official diagnosis.