How Do Colorblind People See?

Not in black and white. Color vision deficiency usually means certain colors are hard to tell apart, not that color disappears. Here's what that looks like, type by type.

The quickest way to understand it is to see it. Our color blindness simulator runs sample scenes (or your own photo) through each type of color vision, so you can compare them side by side. This page explains what you'll notice.

Red-green vision (deutan & protan)

Red-green deficiency is by far the most common. Reds, greens, browns and oranges lose contrast and can look like shades of the same muddy color. Two things people often notice:

A red apple doesn't "pop" against green leaves; both read as similar.
Status colors get confusing: a red "error" and a green "success" can look alike, which is why good design never relies on color alone.

Deutan (green-weak) and protan (red-weak) are similar, but protan vision also makes reds look darker, so a red brake light or warning can be easy to miss. Try the deutan test or protan test to screen each axis.

Blue-yellow vision (tritan)

Tritan deficiency is rare and works on a different axis: blues and greens, and yellows and pinks, become hard to separate. Because it's often acquired rather than inherited, a new blue-yellow result is worth checking with an eye professional. The tritan test screens this axis.

What it's like day to day

Most people with color vision deficiency have completely normal, sharp vision; it's specifically color discrimination that's reduced. Many adapt so well they don't realize they see color differently; they just learn the "usual" names for colors. That's exactly why early screening can be helpful, especially for children in color-coded classrooms.

Curious about your own color vision? The free color blind test takes about 90 seconds. To see the world through colorblind eyes, open the simulator.

Frequently asked

Do colorblind people see in black and white?

Almost never. Total color blindness (monochromacy) is very rare. The common types are red-green and blue-yellow deficiencies, where some colors are hard to tell apart but the world is still full of color.

What colors do red-green colorblind people confuse?

Reds, greens, browns and oranges tend to blur together. A ripe red apple among green leaves, or red text on a green background, can be hard to separate.

Can you show me what it looks like?

Yes. The color blindness simulator lets you run any image or your own photo through deutan, protan, or tritan vision with an adjustable severity.