Free online color blindness simulator. Simulate protanopia, deuteranopia, tritanopia, and achromatopsia. Enter colors or upload images to test accessibility. 100% client-side. | No Signup, Client-Side · No Server Uploads
Zero Dependencies·Accessibility ToolColor Simulation
🖼️ Image Simulation
Upload an image to view it through different color blindness types
Color Blindness Simulator - Free Online Vision Simulation Tool
Color Blindness Simulator is a free accessibility design tool that helps designers and developers understand how people with different types of color blindness perceive colors. Supports four types: Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Achromatopsia (total color blindness). Enter colors directly or upload images for simulation. All computation happens on your device — Pick a Color, other values and other inputs stay in your browser for privacy.
Why choose Color Blindness Simulator
- Color Simulation: See any color through 5 different vision types
- Image Simulation: Upload images to view full scenes
- Preset Colors: Quick switch between common colors
- Hex Values: Display simulated color approximations
- 100% Client-Side: All processing in your browser
FAQ
How to use the Color Blindness Simulator?
Enter a hex color value (e.g. #FF0000) or use the color picker. Click preset colors to quickly switch. The simulation shows how the color appears with different types of color blindness.
What types of color blindness are supported?
Four types: Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), and Achromatopsia (total color blindness).
What's the difference between protanopia and deuteranopia?
Protanopia is insensitivity to red wavelengths - reds appear darker or greenish. Deuteranopia is insensitivity to green wavelengths - reds and greens are hard to distinguish. Both are red-green color blindness but with different perceptions.
How can designers benefit from this tool?
Designers can check how their color schemes appear to color-blind users, ensuring WCAG accessibility standards are met. It helps identify contrast issues early, making products more inclusive.
Are uploaded images saved anywhere?
No. All image processing is done locally in your browser using Canvas. No images are uploaded to any server.