All tools
My cones: not set. Charts and the camera use plainly labelled defaults.
Set My conesTell two colors apart
Pick two colors. The page says whether full color vision can separate them, whether your cones can, and whether protan, deutan, or tritan vision still can.
As they are Clear
Protanopia Close
Deuteranopia Close
Tritanopia Clear
Lightness contrast is 1.0 to 1. Faint if one color is text on the other.
Pairs that often collide
If a sign, chart, or outfit uses only these pairs, add a word, a shape, or a lightness difference. The names are the part that still works when the hues do not.
- Red Green The usual mix-up for red-green deficiency. Both can look brown or dull.
- Green Brown Brown is a dark red-orange, so it slides toward green.
- Blue Purple Purple is blue plus red. When red drops out, purple looks blue.
- Pink Gray A light red can lose its color and read as gray.
- Orange Yellow These stay closer than they look once red and green trade places.
- Red Black Strong protan vision sees red as darker, so a red light can disappear on a dark background.
Boost a picture
Picture boost now lives with charts and screenshots: open Charts.
Your data on this device
- Wardrobe: 0 swatches (up to 12).
- My cones: not saved.
Everything here is stored in this browser only. Clearing your browser's site data deletes your wardrobe and My cones.
Not on this site. Food-doneness claims, medication identification, and skin diagnosis are skipped on purpose. Those need the right tools and a clinician.
Further reading
- National Eye Institute: color blindness — what it is, the types, and what tends to help in daily life.
- MedlinePlus Genetics — how common red-green deficiency is, by sex and ancestry.
- Color Oracle — a free desktop app that shows a whole screen the way protan, deutan, or tritan vision sees it. Handy for a friend or a designer.
- DaltonLens — names the color under the pointer and can mark matching colors in a chart.