Color Blindness Simulator [2025]
Visualize how your images & palettes appear with different color vision deficiencies.
Input Source
Upload an image
Drag & drop or click to browse (Max 10MB)
Simulation Type
Red-Blind (difficulty distinguishing blue/green and red/yellow).
Original View
Protanopia View
Why Use a Simulator?
Approximately 1 in 12 men and 1 in 200 women have some form of color vision deficiency. Designing with accessibility in mind ensures your content is usable and understandable by a wider audience.
This tool helps you:
- Check if color contrast is sufficient under different CVD conditions.
- Identify potential issues where information is conveyed solely by color.
- Empathize with users who perceive colors differently.
- Make informed design decisions for better accessibility.
How It Works
The simulator processes the colors in your image or palette using mathematical models based on research into color vision deficiencies.
- It reads the Red, Green, and Blue (RGB) values of each pixel or color swatch.
- Applies a specific transformation matrix based on the selected CVD type (e.g., Protanopia).
- Recalculates the RGB values to approximate how they would be perceived.
- Displays the resulting image or palette.
Note: Simulations are approximations. Individual experiences of CVD can vary.
Frequently Asked Questions
Is the simulation perfectly accurate?
Simulations are based on scientific models but are approximations. Real-world perception can be influenced by factors like lighting conditions, screen calibration, and individual variations in CVD. Use this tool as a guide for accessibility checking, not a definitive diagnostic tool.
What image formats and sizes are supported?
The tool accepts common formats like PNG, JPG, GIF, and WebP. For performance reasons, there's a suggested maximum file size (e.g., 10MB). Very large images might process slowly in the browser.
Are my uploaded images stored?
No. All image processing happens directly in your web browser. Your images are not uploaded or stored on our servers, ensuring your privacy.
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