What types of color blindness does this tool simulate?

The tool simulates 9 types including deuteranopia, protanopia, tritanopia, achromatopsia (complete color blindness), and the anomaly variants (deuteranomaly, protanomaly, tritanomaly, achromatomaly) which represent partial deficiencies.

How accurate is the simulation?

The simulation uses a peer-reviewed algorithm based on published research on color vision deficiencies. It provides a good approximation of how colors appear to people with each condition, though individual experiences vary.

Are my images uploaded to a server?

No. All processing happens entirely in your browser using the Canvas API. Your images never leave your device.

What percentage of people are color blind?

Approximately 8% of males and 0.5% of females have some form of color vision deficiency. Deuteranomaly (weak green sensitivity) is the most common type, affecting about 5% of males.

Can I use this to make my website WCAG compliant?

This simulator helps you identify color-related accessibility issues. However, full WCAG compliance also requires contrast ratio checks, text alternatives, and other considerations beyond color alone.

Images Tool Box

Utilities

Color Blindness Simulator Online Free

Upload any image and preview how it looks to people with different types of color vision deficiency. Test for deuteranopia, protanopia, tritanopia, achromatopsia, and more. Free, browser-based, and private.