Color Vision Simulator Examples Vischeck's color vision model allows you to simulate how the world looks to people with various sorts of color deficiency. As you can see from these examples, 'color blindness' is really a misnomer- most 'color blind' people do in fact see colors! The colors seen may be different than those seen by someone with normal color vision. Also, people with color deficiencies may see certain colors (like red and green) as very similar, while someone with normal color vision sees them as quite dissimilar. (Complete color blindness does occur, but is quite rare.) For more information on color deficiencies, see Alex Wade's recent article from Planet Medica. The world. How the world looks to a person with a red/green color deficit (deuteranopia). How the world looks to a person with a blue/yellow color deficit (tritanopia). Some colorful hats. As seen by a person with deuteranopia. As seen by a person with protanopia, another form of red/green deficit. This is an Ishihara plate commonly used to check for red/green color blindness This is what a red/green color-blind person might see. Note that the digit (3) is practically invisible. People with color deficiencies may have difficulty distinguishing certain colors (e.g., a red/green color deficiency means that reds and greens are more difficult to distinguish). But as this photo demonstrates, many other colors are just as distinguishable to a person with a color deficiency as to someone with normal color vision. Poppies and cyclamen. Protanope. Tritanope.