People think that being color blind means you see the world in black and white, but that's not true at all.
According to the National Eye Institute, lots of people experience a very mild kind of color blindness. Instead of "not seeing" certain colors, they just have a hard time telling the difference between them.
If you want to test your eyesight try this color test. You simply pick the darkest shade of each color. But be careful, your eyes might play tricks on you!
Don't forget to share this test and challenge your friends to do better than you!