How to Use the Color Blindness Simulator (Protanopia, Deuteranopia, Tritanopia)
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1
Pick a target color or upload an image to inspect.
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2
Toggle between vision deficiency models: Protanopia (Red-blind), Deuteranopia (Green-blind), Tritanopia (Blue-blind), or Achromatopsia (Monochromacy).
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3
Inspect the real-time simulated color swatch or filtered image.
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4
Verify that your critical UI signals (e.g. error alerts vs success badges) maintain distinct contrast for colorblind users.
Practical Example & Use Case
Common Real-World Scenario
Testing red error borders (#ef4444) and green success banners (#10b981) under Deuteranopia to verify that icons and text labels accompany color indicators.
Technical Notes & Limitations
Browser Engine Architecture
Simulations apply Brettel-Vienot-Mollon and Machado color transformation matrices in real time.
Frequently Asked Questions
What is the most common form of color blindness?
Deuteranomaly (red-green color deficiency) is the most common, affecting approximately 6% of men and 0.4% of women worldwide.