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Color Blindness Simulator

Any frame, images included, as people with color blindness and low vision see it, with colors that collapse flagged.

Try the free web version: Color Blindness Simulator →

What it does

Color Blindness Simulator shows any frame, images and illustrations included, the way people with each type of color vision see it: the three dichromacies, the three anomalous types (deuteranomaly alone is about 5% of men), achromatopsia and achromatomaly. The model is Machado et al. 2009, with a severity slider.

Add low vision too: blur, cataract, contrast loss, bright light, ghosting, tunnel vision and macular degeneration. Place labeled boards next to the frame, refresh them after edits, and list the color pairs that collapse for someone, with a fix. Everything runs on your machine.

  1. Everyone sees it differently

    Eight color vision types, side by side, on the real pixels.

  2. Low vision, too

    Cataract, tunnel vision, macular degeneration and more.

  3. Colors that collapse, caught

    Pairs that look alike for someone, with a color that tells them apart.

  4. Know who you design for

    Every type with how common it is, and a severity slider.

Everything it does

Color vision

  • Protan, deutan and tritan, full and anomalous
  • Achromatopsia and achromatomaly
  • Severity slider, prevalence per type

Low vision

  • Blur, cataract, contrast loss, bright light
  • Ghosting, tunnel vision, macular degeneration

Checks

  • Colors that collapse, with a fix
  • Text whose contrast drops
  • Boards next to the frame, refreshed in place

10 free uses, then one license or Lab Pro. See pricing →

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