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Preview any image the way color-blind users see it — protanopia, deuteranopia, tritanopia.
Upload a UI screenshot, design mockup, or photo and preview how it looks to people with protanopia, deuteranopia, tritanopia, and full color blindness (achromatopsia), plus the milder "-anomaly" variants. Runs entirely in your browser using canvas — nothing is uploaded. Use it to catch color-only signals (like red/green status dots) before they ship.
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No green cones — the most common form; reds and greens both shift toward tan/brown.