Design & Color
Free Color Blindness Simulator
Preview how an image looks to people with common color vision deficiencies, entirely in your browser.
Tool
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.
Official sources
These tools give estimates for planning. Agency schedules change — always confirm against the official issuance before filing or paying.
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