//⚫ is not quite distinguishable for person with colorblind
Author: kamparCreated Jul 31, 2026Updated Jul 31, 2026
To someone with protanopia or deuteranopia (red-green colorblindness), (green) and (orange) rely almost entirely on hue shift for differentiation. When reduced to identical 16x16 pixel circles, they blur into virtually identical shades.
| Category | Male Prevalence | Female Prevalence |
|---|---|---|
| All Red-Green CVD (Total Umbrella) | ~8.0% (1 in 12) | ~0.5% (1 in 200) |
| └─ Protanopia (Missing Red Cones) | ~1.0% | ~0.01% |
| └─ Deuteranopia (Missing Green Cones) | ~1.5% | ~0.01% |
| └─ Protanomaly / Deuteranomaly (Shifted Cones) | ~5.5% | ~0.48% |
Globally, ~340–350 million people live with red-green CVD (roughly equivalent to the entire population of the United States).
At least 100 million people have severe protanopia or deuteranopia, making green/orange Unicode indicators virtually indistinguishable to them.
.github/skills/frontend-design-review/references/review-output-format.md
Source: microsoft/skills