color-accessibility-guide
Installation
SKILL.md
Color Accessibility Guide
Design data visualizations that are accessible to colorblind readers and follow best practices for clarity, using tested palettes and encoding principles.
Color Vision Deficiency Overview
Approximately 8% of males and 0.5% of females have some form of color vision deficiency (CVD). The most common types:
| Type | Prevalence (Male) | Affected Colors | Commonly Confused |
|---|---|---|---|
| Deuteranomaly (green-weak) | 5% | Green | Red and green |
| Protanomaly (red-weak) | 1% | Red | Red and green |
| Deuteranopia (no green) | 1% | Green | Red and green |
| Protanopia (no red) | 1% | Red | Red and green |
| Tritanopia (no blue) | 0.003% | Blue | Blue and yellow |
| Monochromacy | Very rare | All | All colors |
Key takeaway: Never rely solely on a red-green distinction to convey information. About 1 in 12 male readers cannot distinguish them.