Online Tool Store
Color Blindness Palette Fixer
Color Blindness Palette Fixer separates the colours; labels and patterns are what make a chart readable when colour fails entirely.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Design & Color
Color Blindness Palette Fixer
Frontend preview — no upload or external service.
Adjusted palette
Green and red collapse to near-identical browns under deuteranopia. Adjusting lightness by 18 points separates them while keeping both recognisably on-brand.
How the Color Blindness Palette Fixer works
- Paste the palette as hex values.
- Simulate each deficiency type — deuteranopia is the most common and the one red and green palettes fail.
- Apply the suggested adjustment, then check the pairs that were colliding are now separable by lightness as well as hue.
FAQ
Which deficiency should I design for?
Deuteranomaly and deuteranopia are the most common, affecting red-green discrimination. A palette that survives those usually survives protanopia too. Tritan deficiencies are much rarer but affect blue-yellow pairs.
Why adjust lightness rather than hue?
Because lightness difference survives every form of colour vision deficiency. Two colours that differ only in hue can become identical; two that differ in lightness stay distinguishable, and stay distinguishable in greyscale printing as well.
Is colour alone ever enough?
No. Colour should be a secondary channel. A chart also needs labels, patterns or direct annotation, because a viewer who cannot separate two series will not be helped by a better palette alone.
How we compare
| Feature | Online Tool Store | A design app | A style guide PDF |
|---|---|---|---|
| Simulates all three types | ✓ | ✓ | One type |
| Suggests fixes | ✓ | ✗ | ✗ |
| Keeps brand hues | ✓ | ✗ | ✗ |
| No sign-up | ✓ | ✓ | ✗ |
Color Blindness Palette Fixer separates the colours; labels and patterns are what make a chart readable when colour fails entirely.