ReddRadar
Agent skill
accessibility-contrast-audit
[Design System] Quantitative accessibility audit for UI - contrast ratios, font sizes, tap targets, heading hierarchy. Use when (1) checking WCAG color contrast compliance, (2) auditing text sizes for readability, (3) validating touch/click target sizes, (4) reviewing heading structure and landmarks, (5) user asks to 'check accessibility', 'audit contrast', 'WCAG compliance', or 'a11y check'.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/data/accessibility-contrast-audit
SKILL.md
Accessibility & Contrast Audit
Quantitative accessibility checks for contrast, font size, hit areas, and semantic structure.
Quick Start
python3 scripts/audit_accessibility.py --source src/ --tokens tokens.json
WCAG Standards Reference
| Criterion | Level AA | Level AAA |
|---|---|---|
| Normal text contrast | 4.5:1 | 7:1 |
| Large text contrast (18px+ or 14px bold) | 3:1 | 4.5:1 |
| UI components/graphics | 3:1 | 3:1 |
| Minimum touch target | 44×44px | 44×44px |
| Minimum font size (body) | 16px | 16px |
Problem Types
| Type | Severity | Description |
|---|---|---|
low-contrast |
error | Text/background contrast below WCAG threshold |
text-too-small |
warning | Font size below recommended minimum |
hit-area-too-small |
warning | Touch/click target below 44×44px |
heading-skip |
warning | Heading levels skipped (h1→h3) |
missing-alt |
error | Image missing alt text |
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