Color Blindness Simulator

Instantly preview your images as seen by people with 8 types of color blindness.
Elegant blue-based before/after slider, crop-and-combine, export, and accessibility tips for designers and developers.

Analyze Your Design


Drag & drop your image here or click to browse
PNG, JPG, SVG (max 10MB)

Accessibility Analysis

Original Protanopia Deuteranopia Tritanopia Achromatopsia Protanomaly Deuteranomaly Tritanomaly
Original Image
Original image
Simulated View
Simulated view
50%
Before/After Slider
Processing...

What is Color Blindness?

Color blindness (color vision deficiency) affects 1 in 12 men and 1 in 200 women globally. It makes distinguishing certain colors difficult, especially reds, greens, and blues. The most common types are:

  • Protanopia: Red-blind
  • Deuteranopia: Green-blind
  • Tritanopia: Blue-blind (rare)
  • Achromatopsia: Total color blindness (very rare)

Why care? Accessible design ensures everyone can use your website, app, or product. This tool helps you see what your users see!

Color Blind-Friendly Design Tips
  • Don’t rely on color alone for meaning
  • Use patterns, icons, and text labels
  • Keep high contrast between text and background
  • Avoid red/green and blue/yellow pairs
  • Test your work with simulators!
Types of Color Blindness
Protanopia Deuteranopia Tritanopia Achromatopsia
  • Protanopia: Red-blind (~1% men)
  • Deuteranopia: Green-blind (~1.5% men)
  • Tritanopia: Blue-blind (very rare)
  • Achromatopsia: No color at all (extremely rare)
Real-World Use Cases
  • Designing accessible websites & apps
  • Verifying marketing materials
  • Teaching color accessibility to students
  • Presenting to clients and stakeholders

FAQ

This free tool helps you visualize how images appear to people with various types of color blindness. It's essential for designers, developers, teachers, and anyone who wants to create accessible visuals.

No. This is a simulation tool, not a diagnostic test. If you suspect you have color vision deficiency, please consult an eye care professional.

Yes! This simulator is free for personal and educational use.

The simulation uses established color transformation matrices for each type. It's a close approximation, but individual experiences may vary.

Absolutely! Download and share simulated images in your presentations, reports, or client demos.

We welcome suggestions! Please reach out via our GitHub or contact form.