This tool simulates 8 types of color vision deficiency: Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), Protanomaly (red-weak), Deuteranomaly (green-weak), Tritanomaly (blue-weak), Achromatopsia (complete color blindness), and normal vision for comparison. Each simulation uses scientifically accurate color transformation matrices.
The simulations use industry-standard color transformation matrices based on research by Brettel, Viénot, and Mollon. While no simulation is 100% perfect (color perception varies individually), these algorithms provide highly accurate approximations used by accessibility professionals worldwide.
"-opia" (like Protanopia) means complete absence of that color receptor - total color blindness for that channel. "-omaly" (like Protanomaly) means the receptor is present but defective - partial color weakness. Anomalies are more common and less severe than complete color blindness.
Yes! Take screenshots of your website, app, or design mockups and upload them. You can test individual screens, color palettes, charts, buttons, or any visual element. This helps identify accessibility issues before deployment.
Absolutely! All image processing happens entirely in your browser using HTML5 Canvas. Your images are never uploaded to any server, transmitted over the internet, or stored anywhere. Everything stays on your device.