Color Blindness Simulator - Test Accessibility

How the Color Blindness Simulator Works

1. 01Choose Color Picker mode to test a specific color, or upload an image
2. 02View how the color or image appears under different types of color vision deficiency
3. 03Compare Normal Vision side-by-side with simulated views
4. 04Adjust your design to ensure accessibility across all vision types

Designing for Color Accessibility

Color vision deficiency affects approximately 8% of males and 0.5% of females worldwide. The most common types are protanopia and deuteranopia (red-green color blindness). Testing your designs with this simulator ensures that UI elements, charts, and visual content remain distinguishable for all users. WCAG 2.1 Success Criterion 1.4.1 requires that color is not the only visual means of conveying information.

When to Use the Color Blindness Simulator

Use this simulator during the design phase of any visual project: websites, mobile apps, infographics, charts, presentations, and print materials. Test before launch to catch accessibility issues early. Particularly important for data visualizations, navigation elements, and any UI where color carries meaning.

Common Use Cases

• ·Testing website and app designs for WCAG color accessibility compliance
• ·Verifying that charts and data visualizations are readable by colorblind users
• ·Checking brand color palettes for sufficient contrast across vision types
• ·Educational use: understanding how color vision deficiency affects daily life

Expert Tips

• ✻Always test protanopia and deuteranopia - these are by far the most common color vision deficiencies
• ✻Use the color picker mode for quick tests of specific hex values during development
• ✻Combine with the Color Contrast Checker tool for comprehensive accessibility verification

Frequently Asked Questions