This chart is the result of a frustrating search for a simple list of color combinations to avoid if you want to accommodate various forms of colorblindness. Each intersection below lists one of the conditions that could cause someone to confuse the colors at the intersection, but there could be more than one condition that affects a particular color combination. If you have a correction or know of other problematic color combinations, feel free to email me (rabdill@umn.edu) or, even better, submit a pull request.
| green | |||||||||
| red | Deuteranomaly | red | |||||||
| brown | Protanopia | Deuteranopia | brown | ||||||
| blue | Tritanomaly | Protanopia | blue | ||||||
| gray | Deuteranomaly | gray | |||||||
| black | Protanopia | black | |||||||
| yellow | Protanopia | Deuteranomaly | Deuteranopia | Tritanopia | yellow | ||||
| orange | Protanopia | Tritanopia | Protanopia | orange | |||||
| violet | Deuteranomaly | Tritanopia | Tritanopia | violet | |||||
| pink | Tritanomaly | Protanopia | Deuteranomaly | Tritanomaly |
Sources:
- National Eye Institute, "Facts About Color Blindness"
- Colour Blind Awareness, "Types of Colour Blindness"