Design & Color
Free Color Blindness Simulator
Preview how an image looks to people with common color vision deficiencies, entirely in your browser.
Color Blindness Simulator
Files you add are processed entirely in your browser — nothing is uploaded to our servers.
How it's calculated
- • Images are processed locally on a canvas and never sent to a server.
- • Applies published color-vision-deficiency simulation matrices for protanopia, deuteranopia, and tritanopia, plus a luminance grayscale for achromatopsia.
- • Results are an approximation for design review and do not replace testing with real users.
Sources & References
This tool provides estimates for general guidance only and may not reflect the latest rules or your company's specific policies. Always verify against official government tables and consult a professional before relying on the result.
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