ToolStack

Color Blindness Simulator

Preview a colour or image through protanopia, deuteranopia, tritanopia and achromatopsia.

100% private — everything runs in your browser

How to Use

  1. 1

    Type a hex colour to test a single swatch.

  2. 2

    Optionally drop an image to simulate the full picture.

  3. 3

    Compare the four variants and download the PNGs you need.

Examples

Red error state

Input

#E5484D

Output

Protanopia and deuteranopia both shift it toward olive-brown, losing the “error” signal.

Chart palette

Input

A screenshot of a dashboard

Output

Four PNG previews that show whether the series stay distinguishable.

FAQ

Which deficiency types are simulated?

Protanopia, deuteranopia, tritanopia and achromatopsia, using the Machado 2009 matrices.

Is the simulation exact for every person?

No. It models the most common full deficiencies; partial and individual variation differs.

Is my image uploaded?

No. Images are processed on a canvas in your browser and never leave the device.

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