Color Blindness Simulator
Experience how the world looks with different types of color vision deficiency. Upload images or use your webcam to simulate color blindness in real-time.
Vision Type
Color enhancement
Upload Image
Upload an image to simulate how it appears with color blindness
Drag and drop your image here
or
Supports JPG, PNG, GIF, WebP
What is a Color Blindness Simulator?
A color blindness simulator is an essential tool that demonstrates how individuals with color vision deficiencies perceive the world. Color blindness, also known as color vision deficiency, affects approximately 8% of men and 0.5% of women worldwide. This condition makes it challenging to distinguish between certain colors, particularly red and green combinations. Our simulator helps designers, developers, and educators understand these visual differences to create more accessible and inclusive content.
The simulator works by applying scientifically accurate color transformation algorithms to images or live video streams. When you upload an image or activate your webcam, our tool processes each pixel to replicate how someone with protanopia, deuteranopia, tritanopia, or achromatopsia would see that content. This real-time simulation provides immediate feedback, making it invaluable for testing website designs, graphics, presentations, and any visual content that needs to be accessible to people with color vision deficiencies.
How Image Simulation Works
Our image simulation feature uses the Machado et al. physiologically-based model to transform your uploaded images. When you drag and drop an image or select one from your device, the simulator converts the color space from RGB to LMS (Long, Medium, Short wavelength), applies the appropriate color vision deficiency matrix, and converts back to RGB. This process accurately replicates the biological mechanisms of color blindness. The before-and-after comparison slider lets you instantly see the difference between normal color vision and simulated color blindness, helping you identify potential accessibility issues in your designs.
How Webcam Simulation Helps Designers
The live webcam simulation feature is a game-changer for designers and developers who need to test real-world scenarios. By pointing your camera at printed materials, screens, product packaging, or environmental signage, you can instantly see how people with color blindness would perceive these items. This is particularly valuable for user interface designers who want to test color combinations in real-time, educators creating visual learning materials, and product designers ensuring their packaging is accessible. The webcam mode processes video at high frame rates, providing smooth, real-time feedback that helps you make instant design decisions without the need for multiple test prints or iterations.
Why Use Our Color Blindness Simulator?
Accessibility Testing
Ensure your designs are accessible to over 300 million people worldwide with color vision deficiencies. Test images and live content instantly.
Dual Mode Testing
Choose between image upload mode for testing static designs or webcam mode for real-time simulation of physical materials and screens.
Real-time Results
Get instant feedback with GPU-accelerated processing. Switch between different types of color blindness and see changes immediately.
8 Vision Types
Simulate protanopia, protanomaly, deuteranopia, deuteranomaly, tritanopia, tritanomaly, and achromatopsia with adjustable severity.
Browser-Based
No installation required. Works on desktop and mobile devices. Your images are processed locally for complete privacy.
100% Free
Access all features including image simulation, webcam mode, and daltonization completely free with no registration required.
Tips for Using the Color Blindness Simulator
- Use the Image Mode to test website screenshots, logos, infographics, and marketing materials by uploading them directly.
- Try Webcam Mode to test physical products, printed materials, or existing displays in real-time without taking photos.
- Test multiple vision types including protanopia and deuteranopia, which are the most common forms of color blindness.
- Adjust the severity slider to test both complete and partial color vision deficiencies for comprehensive accessibility testing.
- Enable daltonization to see color correction techniques that can make images more distinguishable for color blind users.
Frequently Asked Questions
What types of color blindness can I simulate?
Our simulator supports 8 types: protanopia, protanomaly, deuteranopia, deuteranomaly, tritanopia, tritanomaly, achromatopsia, and normal vision. You can adjust severity levels for each type.
Is my uploaded image saved or stored?
No. All image processing happens locally in your browser. Your images are never uploaded to our servers, ensuring complete privacy and security.
Does the webcam mode work on mobile devices?
Yes! The webcam mode works on both desktop and mobile devices. On mobile, it will use your rear camera by default, perfect for testing real-world materials.
What is daltonization?
Daltonization is a color correction technique that enhances color differences to make images more distinguishable for people with color vision deficiencies. Toggle it on to see the effect.
Can I download the simulated images?
Yes! In image mode, you can download the simulated version after processing. This is useful for sharing results with your team or including in accessibility reports.