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
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.
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