Why is color blindness testing important for UX?

Relying on color alone to convey state (like red error vs green success) alienates color-blind users without secondary iconography or labels.

Can I simulate complete color blindness?

Yes, Achromatopsia (monochromacy) converts luminance to pure grayscale to verify shape and value contrast.

Are these simulations accurate to medical standards?

Yes, the calculations use standard Brettel & Machado perceptual color space transformation models.

Accessibility & A11y Tools• Inclusive UX

Color Blindness Simulator & Vision Deficiency Tester

Approximately 1 in 12 men and 1 in 200 women experience color vision deficiency. Test your UI colors through medically accurate transformation matrices to ensure universal usability.

Simulated purely in client-side canvas matrices. Your palette stays private.

Normal Trichromatic Vision

Standard Preview

Normal color sight perception with all three cone photoreceptors active.

Interactive Badge

Simulated Vision (deuteranopia)

Simulated Palette

How your selected color combination appears to individuals with this vision deficiency.

Simulated Badge

How to Use Color Blindness Simulator

Choose Colors

Select your primary text, button, and background palette colors.

Select Deficiency Type

Toggle between Normal, Protanopia (red-blind), Deuteranopia (green-blind), Tritanopia (blue-blind), or Monochromacy.

Inspect Visibility

Observe color shifts and verify that status messages and links remain distinguishable without color alone.

About Color Blindness Simulator

Applies linear transformation matrices to sRGB coordinates converted into LMS cone excitation space, simulating the loss of L, M, or S cone photoreceptor sensitivity.

Supported Formats

HEXRGB

Operational Limits

•Simulation matrices approximate perceptual shifts experienced by dichromats.

Key Features

Medically referenced Machado/Brettel color deficiency matrices
Simulates Protanopia, Protanomaly, Deuteranopia, Deuteranomaly, Tritanopia, and Monochromacy
Side-by-side normal vs simulated preview swatches
Live sample badge, link, and button rendering
Copy transformed hex values directly for documentation

Frequently Asked Questions

Deuteranomaly and Deuteranopia (red-green color blindness) affect approximately 6% of males.

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