Color Blindness Simulator
See how your images appear to people with different color vision deficiencies.
About Color Blindness Simulator
The Color Blindness Simulator shows how an image looks to people with different types of color vision deficiency, including the three common dichromacies and complete achromatopsia. Designers use it to verify that interfaces, charts, and graphics remain readable without relying on color alone. Upload a picture, pick a vision type, and the simulator shifts the hues exactly the way that deficiency is understood to alter perception. It runs entirely in the browser, so confidential designs and unreleased products never leave your device.
Key Features
- ✓Simulates Protanopia, Deuteranopia, Tritanopia, and Achromatopsia
- ✓Compares the original with the simulated view
- ✓Cycles through all deficiency types on one image
- ✓Runs locally with instant results
- ✓Free with no signup or watermark
How to Use Color Blindness Simulator
- 1
Upload Your Image
Click "Choose Image" and select any picture from your device. Any common image format works.
- 2
Select a Vision Type
Pick Protanopia, Deuteranopia, Tritanopia, or Achromatopsia to simulate that form of color blindness.
- 3
View the Simulation
The tool recolors the image to approximate how it appears to someone with that deficiency.
- 4
Compare All Types
Switch between types to check whether charts, status colors, or warnings stay distinguishable.
- 5
Improve Accessibility
If elements become hard to tell apart, adjust colors, patterns, or labels in your original design.
Read the complete step-by-step guide with screenshots and pro tips
Common Use Cases
- •A designer checks that a dashboard's red and green indicators are still distinguishable.
- •A teacher verifies a classroom chart works for students with color blindness.
- •A developer confirms error and success states do not rely on color alone.
- •A cartographer tests whether map regions need patterns in addition to hues.
- •A packaging designer makes sure label variants can be told apart.
Frequently Asked Questions
Is my design uploaded to run the simulation?
No. The simulation is applied entirely in your browser. Your image is never transmitted to a server, so confidential or unreleased designs stay private.
Which types of color blindness can I simulate?
The tool covers Protanopia and Deuteranopia (red and green deficiencies), Tritanopia (blue deficiency), and Achromatopsia (complete color blindness).
Does the simulator cost anything?
No. The Color Blindness Simulator is completely free and requires no signup. Run as many simulations as you need.