Color Blindness Simulator
Preview a palette through common color-vision simulation matrices.
See your palette as others do
Around one in twelve men has some form of color-vision deficiency, and a palette that looks distinct to you can collapse into indistinguishable tones for them. This simulator previews your colors through the common types of color blindness so you can catch problems before shipping.
Seeing red and green merge, or a status indicator lose its meaning, makes accessibility concrete rather than theoretical. Use it to check that charts, buttons, and states stay distinguishable for everyone, and adjust the colors that fail.
Accurate and private
Everything runs locally in your browser using standard web APIs — nothing is uploaded, logged, or stored on any server — so the tool works offline, responds instantly, and keeps whatever you paste in on your own device. That makes it safe to use even for confidential, client, or internal data you would never send to an unknown website.
Frequently Asked Questions
What does the color blindness simulator do?
It applies approximate color-vision matrices to a pasted palette so you can compare normal and simulated swatches.
Can I use the output in production?
Yes. Review the generated values, then copy the CSS, color list, or text output into your design system or project files.
Does this upload my colors or images?
No. The tool runs in your browser. Uploaded images are read locally and are not sent to a server.
Is this tool free?
Yes. It is free to use and does not require an account.
Need a polished visual system? Bushe can help turn rough ideas into production-ready design.