Color Blindness Simulator approximates how an image may appear under common color-vision deficiency models so designers can catch hue pairs that collapse together.
Upload an image, choose a simulation mode available on the page, and compare the preview against the original. Adjust your palette, then re-check.
Simulations are approximations, not a medical diagnosis or a guarantee of accessibility compliance on their own.
What Color Blindness Simulator does
Preview approximate color-vision simulations on uploaded images.
- Image upload for the artwork under review
- Simulation modes for common deficiency models
- Visual preview of the filtered result
- Hint text describing scope
- Local canvas-style processing in the browser
Who Color Blindness Simulator is for
- UI designers validating dashboard color encodings
- Brand teams checking campaign creatives
- Educators demonstrating color-vision challenges
- Engineers reviewing chart color scales
How to use Color Blindness Simulator
1. Open Color Blindness Simulator on beeforge.dev.
2. Upload the image you want to inspect.
3. Select a simulation mode from the controls on the page.
4. Compare the preview, revise colors in your design tool, and upload again.
Features
- Image-first workflow instead of abstract swatches only
- Multiple approximation modes where offered
- Fast local previews for iteration
- Pairs with contrast checking for text overlays
- No design-suite plugin required for a quick pass
Examples
- Check a traffic-light status legend that relies only on red vs green.
- Preview a heatmap before publishing a research poster.
- Test a logo lockup on a busy photo background under deuteranopia simulation.
Tips and limits
- Do not rely on color alone; add labels, patterns, or icons.
- Simulators approximate; real user testing still matters.
- Large images may be slow to filter in a tab; resize previews when needed.
- Contrast ratios for text still need a dedicated contrast checker.
Related tools
- Contrast Checker to measure text and background contrast ratios numerically
FAQ
Is this a medical test?
No. It approximates how images may look under common models. It does not diagnose vision conditions.
Where is the image processed?
In your browser. Prefer not uploading confidential creatives on shared devices.
Does a good simulation mean WCAG pass?
No. Run contrast checks and follow your accessibility process separately.
Which deficiencies are modeled?
Use the modes listed in the UI; common red-green oriented simulations are typical.
Can I export the simulated image?
Follow on-page export controls if present; otherwise screenshot the preview for notes.