Color-Blind Safe Checker
Check whether two colors stay distinguishable for people with color blindness. Everything runs on your device — fast, free, and private.
The result will appear here…
or press Ctrl+Enter
Everything runs in your browser. Your data is never sent to our servers.
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Example
Example Input
#ff0000, #00ff00
Example Output
Verdict: NOT safe — pick more distinct colors ✗
How to Use
- 1Enter a color or data in the Input field.
- 2Set "More settings" if needed, then click Run (or Ctrl+Enter).
- 3Copy the result — a swatch is shown next to each value.
About Color-Blind Safe Checker
The Color-Blind Safe Checker simulates two colors under several common color-vision deficiencies and measures their ΔE under each — telling you whether the pair stays distinguishable.
Important when colors carry meaning (e.g. success/error status, chart lines). If it is not safe, pick more distinct colors or add labels/patterns.
FAQ
Is my data sent to a server?
No. Color-Blind Safe Checker runs entirely in your browser — your data never leaves your device.