Do color blind people see in black and white?

Almost never. Seeing only in shades of grey is total color blindness (achromatopsia), which is very rare, around 1 in 30,000. The common red-green and blue-yellow types leave most color intact and only blur certain pairs.

What colors do color blind people confuse?

It depends on the type. Red-green color blindness blurs reds with greens, greens with browns, and can make purple look blue. Blue-yellow color blindness blurs blues with greens and yellows with pinks. The confusions follow the affected axis.

What does red look like to a color blind person?

For a protan (red-weak) deficiency, red often looks darker and duller and can blend into brown or black. For a deutan (green-weak) deficiency, red is more visible but still mixes easily with green and brown. The exact look varies with severity.

Can color blind people see purple and pink?

They see them, but can mix them up. Purple is blue plus red, and when the red part is hard to see it can look like plain blue. Pink can drift toward grey or pale green for some types. The colors register; they just shift toward their neighbors.

How can I see what a color blind person sees?

A simulator gives a rough idea, but it is filtered through your own normal vision and screen, so treat it as an approximation. A color filter tool can preview how colors shift, while a proper test tells you about your own color vision rather than a simulation.

Blog

What Do Color Blind People See?

Short answer

Most color-blind people see colors but confuse particular pairs. The colors affected depend on type and severity; seeing only shades of grey is very rare.

Color blind people see color, just a narrower range of it. The most common type, red-green color blindness, makes certain reds, greens, browns and oranges look alike rather than turning the world grey. Blue-yellow color blindness, which is rarer, blurs blues with greens and yellows with pinks. Only total color blindness, which is very rare, removes color and leaves a view in shades of grey. What someone sees depends on which cone is affected and how strongly.

Reviewed June 14, 2026

It is not seeing in black and white

The most common belief about color blindness is also the most wrong: that color-blind people see in greyscale. Almost no one does. The everyday red-green and blue-yellow types leave most colors looking normal and only make specific pairs hard to tell apart.

True greyscale vision belongs only to total color blindness, which affects roughly 1 in 30,000 people. For everyone else, color is present but the palette is compressed.

What red-green color blindness looks like

This is the common family, covering the protan (red-weak) and deutan (green-weak) types. Reds, greens, browns and oranges start to overlap, so a green and a brown can read as the same muddy shade, and a red can look brownish or, for protans, noticeably darker and dimmer than it does to others.

It shows up in small ways: ripe and unripe fruit looking similar, red text on a dark background fading out, or purple reading as plain blue because its red component is the part that is hard to see. The hues are not gone, they just sit closer together than they should.

What blue-yellow color blindness looks like

Blue-yellow (tritan) color blindness is much rarer and runs on a different axis. Blues and greens drift toward each other, and yellow can look washed out or pinkish. Someone with it might confuse a blue and a teal, or struggle to separate yellow from a pale pink, while red and green stay relatively clear.

What total color blindness looks like

Total color blindness, or achromatopsia, is the rare case that actually does remove color, leaving the world in shades of grey. It usually comes with extra light sensitivity and reduced sharpness, because it reflects a cone system that barely works at all. It is a different and far less common condition than the partial deficiencies most people mean by "color blind."

Why a screen can only approximate it

Simulations that claim to show "what a color-blind person sees" are educated approximations, not exact reproductions. They are filtered through your own normal vision and your uncalibrated screen, and they can't capture how the brain adapts to a lifetime of seeing this way. They are still useful for building intuition.

The most accurate picture of one person's color vision comes from testing it rather than simulating it. If you are curious about your own, a screening shows your type and severity, and a color filter tool can preview how colors shift.

Frequently asked questions

Do color blind people see in black and white?: Almost never. Seeing only in shades of grey is total color blindness (achromatopsia), which is very rare, around 1 in 30,000. The common red-green and blue-yellow types leave most color intact and only blur certain pairs.
What colors do color blind people confuse?: It depends on the type. Red-green color blindness blurs reds with greens, greens with browns, and can make purple look blue. Blue-yellow color blindness blurs blues with greens and yellows with pinks. The confusions follow the affected axis.
What does red look like to a color blind person?: For a protan (red-weak) deficiency, red often looks darker and duller and can blend into brown or black. For a deutan (green-weak) deficiency, red is more visible but still mixes easily with green and brown. The exact look varies with severity.
Can color blind people see purple and pink?: They see them, but can mix them up. Purple is blue plus red, and when the red part is hard to see it can look like plain blue. Pink can drift toward grey or pale green for some types. The colors register; they just shift toward their neighbors.
How can I see what a color blind person sees?: A simulator gives a rough idea, but it is filtered through your own normal vision and screen, so treat it as an approximation. A color filter tool can preview how colors shift, while a proper test tells you about your own color vision rather than a simulation.

Informational only, not medical advice. If you have concerns about your color vision, see an eye-care professional.