How common is color blindness?

Red-green color vision deficiency affects about 1 in 12 men and 1 in 200 women of Northern European descent. Blue-yellow (tritan) deficiency and complete color blindness (achromatopsia) are much rarer.

What is the difference between protanopia and protanomaly?

Protanopia means the red-sensitive cones are missing; protanomaly means they work but are shifted, so reds look weaker. The '-opia' types are the stronger form, the '-anomaly' types the milder and more common one.

How accurate are the simulations?

They use published models of how missing or shifted cones change color perception. They're a good design check, but real experiences vary from person to person, so don't treat them as a diagnosis.

Are my colors or images uploaded anywhere?

No. Every tool runs in your browser, so the colors you enter and any image you open are processed on your device and are not sent to our server or stored. Reloading or closing the page clears them.

Is JustYourPalette free?

Yes. Every tool is free with no sign-up and no limits on use. Clearly labeled ads keep it that way.

Can I use the colors and palettes in commercial work?

Yes. Colors and color codes aren't owned by anyone, so you can use anything you make here in personal and commercial projects. Brand colors may still be protected as part of a trademark.

Color Blindness Simulator

Preview your colors with seven types of color blindness.

100% Free
No Sign Up
Works in Your Browser

Color blindness simulator

See colors as people with color blindness do

Your colors

Up to 12 colors, separated by commas or new lines. 6 read.

Normal vision

Trichromacy

Protanopia

No red cones (about 1% of men)

Deuteranopia

No green cones (about 1% of men)

Tritanopia

No blue cones (rare)

Protanomaly

Weak red (about 1% of men)

Deuteranomaly

Weak green (about 5% of men, the most common)

Tritanomaly

Weak blue (rare)

Achromatopsia

No color at all (very rare)

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Every everyday color tool, right in your browser.

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Browse all 28 tools

Color tools: 28
Named colors: 139
Curated palettes: 216

How to use the color blindness simulator

Three steps, all in your browser.

1
Enter your colors
Type or pick the colors you want to test.
2
Read the results
Ratios, pass or fail badges and previews update as you change a color.
3
Fix and copy
Adjust until it passes, then copy the codes that work.

Color Blindness Simulator: what to know

The color blindness simulator shows how colors look to people with different color vision deficiencies: protanopia and protanomaly (red cones missing or shifted), deuteranopia and deuteranomaly (green cones), tritanopia and tritanomaly (blue cones), and achromatopsia (no color vision). Enter colors or a palette and compare the versions side by side.

Red-green deficiency is common: it affects about 1 in 12 men and 1 in 200 women of Northern European descent, with deuteranomaly the most frequent type. Tritan deficiencies and achromatopsia are rare. Because so many people are affected, a chart or status color that relies on red versus green alone will fail for a noticeable share of your audience.

The simulations use published models of how missing or shifted cones change the colors we see. They're excellent for spotting problems in a design, but real perception varies between individuals, so use them as a design check rather than an exact picture of anyone's vision.

Popular uses

Checking charts and maps whose series are told apart by color
Testing success, warning and error colors in a UI
Reviewing game, transit and wayfinding color codes
Choosing data visualization palettes that work for everyone

Tips for the best result

If two colors merge in a simulation, change their lightness, not just their hue.
Pair color with a second cue: icons, patterns, labels or position.
Blue and orange stay distinct for the most common types of color blindness.

Read how JustYourPalette works, browse named colors and curated palettes, and see our privacy details. Colors you enter and images you open are processed in your browser and are never sent to our server.