Color palette generator
Generate beautiful color palettes with the space bar. Lock colors, pick schemes and moods, check contrast, and export to CSS, Tailwind, ASE, or PNG.
Color blindness simulator
See images and palettes as people with protanopia, deuteranopia, tritanopia, and other color blindness types do. Find problem color pairs.
Drop an image or screenshot here, click to upload, or paste
Processed on your device — nothing is uploaded
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Original
How to use Color blindness simulator
See how your images, designs and palettes look to people with color vision deficiency. About 1 in 12 men and 1 in 200 women have some form of color blindness.
Simulate an image
- Protanopia / protanomaly (red), deuteranopia / deuteranomaly (green), tritanopia / tritanomaly (blue), and achromatopsia (no color)
- Adjustable severity, a before/after slider, side-by-side, or every type at once
- Download the simulated image as PNG
Check a palette
Paste your brand or chart colors to find pairs that become hard to tell apart for color-blind viewers — before your users find them.
Simulation uses the Machado, Oliveira and Fernandes (2009) model in linear RGB. Images are processed on your device.
Color blindness simulator FAQs
Is Color blindness simulator free?
Color blindness simulator is a free online tool on ReallyUseful.Tools. No account is required.
Does Color blindness simulator run in my browser?
Color blindness simulator is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
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