Color Blindness Simulator

Accessibility • 100% Client-Side Processing

Color vision deficiency (CVD) simulator. Accurately transforms colors using Machado matrix algorithms to preview what red-green, blue-yellow, and total colorblind users see.

Privacy First: Color Blindness Simulator executes 100% locally in your web browser. No inputs or generated outputs leave your device.

Zero Server Transmission

Normal Vision: #0284c7

Protanopia (Red-Blind)

#3a3bb7

Deuteranopia (Green-Blind)

#3329b3

Tritanopia (Blue-Blind)

#09aaa7

Achromatopsia (Monochromacy)

#656565

Tool Chaining — Continue Workflow

Take your result from Color Blindness Simulator directly into companion utilities:

WCAG Contrast Ratio Checker Color Space Converter & Picker

How to Use

Choose a test color.
View side-by-side simulations for Deuteranopia (green-weak), Protanopia (red-weak), Tritanopia (blue-weak), and Achromatopsia (monochrome).
Check whether status colors (red vs green) remain clearly distinct.

Key Features

•Scientifically accurate Machado transformation matrices
•Simulates all 4 major CVD types
•Visual swatch comparisons

Technical Scope & Limitations

• Simulates common dichromacies; anomalous trichromacy severity can vary individually.