accessibility-contrast-audit

name	accessibility-contrast-audit
description	[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'.

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