For the most part, many people share a common color experience. Some people, however, have a color vision deficiency. That means their perception of colors differs from what most of us see. The most severe varieties of these deficiencies is commonly known as color blindness.

Those who are color blind have a color vision experience that is different from the rest of us, and some of them might not even know it.

People with color blindness aren’t able to decipher differences among colors that are obvious to those who aren’t color blind. And, it turns out, people who don’t have the more severe types of color blindness may not actually be aware of their mild condition until they are tested in a clinic.

Are you one of those people? While only a test administered by an eye care professional can tell you for sure if you are color blind or not, you can test your color vision now by taking this simple quiz. Try to see the word featured on panels of color presented in each slide. Just be sure you don’t cheat by adjusting your monitor!

See if you can spot the words on each color panel in this color vision quiz:

National Eye Institute