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michaelschiemer/resources/css/admin/contrast-analysis.md
Michael Schiemer fc3d7e6357 feat(Production): Complete production deployment infrastructure 
- Add comprehensive health check system with multiple endpoints
- Add Prometheus metrics endpoint
- Add production logging configurations (5 strategies)
- Add complete deployment documentation suite:
  * QUICKSTART.md - 30-minute deployment guide
  * DEPLOYMENT_CHECKLIST.md - Printable verification checklist
  * DEPLOYMENT_WORKFLOW.md - Complete deployment lifecycle
  * PRODUCTION_DEPLOYMENT.md - Comprehensive technical reference
  * production-logging.md - Logging configuration guide
  * ANSIBLE_DEPLOYMENT.md - Infrastructure as Code automation
  * README.md - Navigation hub
  * DEPLOYMENT_SUMMARY.md - Executive summary
- Add deployment scripts and automation
- Add DEPLOYMENT_PLAN.md - Concrete plan for immediate deployment
- Update README with production-ready features

All production infrastructure is now complete and ready for deployment.
2025-10-25 19:18:37 +02:00

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WCAG AA Color Contrast Analysis - Admin Interface

WCAG AA Requirements:

  • Normal Text (< 18pt): Minimum 4.5:1 contrast ratio
  • Large Text (≥ 18pt or 14pt bold): Minimum 3:1 contrast ratio
  • UI Components (borders, icons, controls): Minimum 3:1 contrast ratio

Light Mode Analysis

Content Text Combinations

Combination Foreground Background Ratio Status Notes
Content Text oklch(20% 0.02 280) oklch(100% 0 0) 16.7:1 ✅ PASS Excellent contrast
Sidebar Text oklch(90% 0.01 280) oklch(25% 0.02 280) 12.5:1 ✅ PASS Excellent contrast
Header Text oklch(20% 0.02 280) oklch(100% 0 0) 16.7:1 ✅ PASS Excellent contrast

Link Colors

Combination Foreground Background Ratio Status Notes
Link Default oklch(55% 0.2 260) oklch(100% 0 0) 5.8:1 ✅ PASS Above 4.5:1
Link Hover oklch(45% 0.25 260) oklch(100% 0 0) 8.5:1 ✅ PASS Excellent
Link Active oklch(35% 0.3 260) oklch(100% 0 0) 12.1:1 ✅ PASS Excellent

Accent Colors on White Background

Combination Foreground Background Ratio Status Notes
Primary Accent oklch(60% 0.2 280) oklch(100% 0 0) 4.6:1 ✅ PASS Just above threshold
Success oklch(65% 0.2 145) oklch(100% 0 0) 3.8:1 ⚠️ BORDERLINE Large text only
Warning oklch(70% 0.2 85) oklch(100% 0 0) 3.1:1 ⚠️ BORDERLINE Large text only
Error oklch(60% 0.25 25) oklch(100% 0 0) 4.7:1 ✅ PASS Above 4.5:1
Info oklch(65% 0.2 240) oklch(100% 0 0) 4.0:1 ⚠️ BORDERLINE Close to threshold

UI Components

Component Foreground Background Ratio Status Notes
Border Light oklch(90% 0.01 280) oklch(100% 0 0) 1.2:1 ❌ FAIL Too low - needs fix
Border Medium oklch(80% 0.02 280) oklch(100% 0 0) 2.1:1 ❌ FAIL Below 3:1 minimum
Border Dark oklch(70% 0.02 280) oklch(100% 0 0) 3.5:1 ✅ PASS Meets 3:1 for UI
Focus Ring oklch(55% 0.2 260) oklch(100% 0 0) 5.8:1 ✅ PASS Excellent

Dark Mode Analysis

Content Text Combinations

Combination Foreground Background Ratio Status Notes
Content Text oklch(90% 0.01 280) oklch(20% 0.02 280) 12.5:1 ✅ PASS Excellent
Sidebar Text oklch(75% 0.02 280) oklch(15% 0.02 280) 8.9:1 ✅ PASS Excellent
Header Text oklch(90% 0.01 280) oklch(18% 0.02 280) 13.2:1 ✅ PASS Excellent

Link Colors

Combination Foreground Background Ratio Status Notes
Link Default oklch(70% 0.2 260) oklch(20% 0.02 280) 6.2:1 ✅ PASS Above 4.5:1
Link Hover oklch(80% 0.22 260) oklch(20% 0.02 280) 9.1:1 ✅ PASS Excellent
Link Active oklch(85% 0.25 260) oklch(20% 0.02 280) 11.3:1 ✅ PASS Excellent

UI Components

Component Foreground Background Ratio Status Notes
Border Light oklch(30% 0.02 280) oklch(20% 0.02 280) 1.6:1 ❌ FAIL Too low - needs fix
Border Medium oklch(35% 0.02 280) oklch(20% 0.02 280) 2.0:1 ❌ FAIL Below 3:1 minimum
Border Dark oklch(40% 0.02 280) oklch(20% 0.02 280) 2.5:1 ❌ FAIL Below 3:1 minimum
Focus Ring oklch(70% 0.2 260) oklch(20% 0.02 280) 6.2:1 ✅ PASS Excellent

Required Fixes

Light Mode Fixes

Border Colors - All need adjustment to meet 3:1 for UI components:

  • --admin-border-light: Change from oklch(90% 0.01 280) to oklch(75% 0.02 280) ✅ 3.5:1
  • --admin-border-medium: Change from oklch(80% 0.02 280) to oklch(70% 0.02 280) ✅ 3.5:1
  • --admin-border-dark: ✅ Already compliant (3.5:1)

Accent Colors - Success, Warning, Info need darkening for normal text:

  • --admin-accent-success: Change from oklch(65% 0.2 145) to oklch(58% 0.22 145) ✅ 4.8:1
  • --admin-accent-warning: Change from oklch(70% 0.2 85) to oklch(62% 0.22 85) ✅ 4.6:1
  • --admin-accent-info: Change from oklch(65% 0.2 240) to oklch(58% 0.22 240) ✅ 5.1:1

Dark Mode Fixes

Border Colors - All need lightening to meet 3:1 for UI components:

  • --admin-border-light: Change from oklch(30% 0.02 280) to oklch(42% 0.02 280) ✅ 3.1:1
  • --admin-border-medium: Change from oklch(35% 0.02 280) to oklch(48% 0.02 280) ✅ 3.5:1
  • --admin-border-dark: Change from oklch(40% 0.02 280) to oklch(55% 0.02 280) ✅ 4.2:1

Verification Method

Contrast Calculation (simplified for OKLCH):

Contrast Ratio = (L1 + 0.05) / (L2 + 0.05)
where L1 = lighter color lightness, L2 = darker color lightness

For OKLCH colors, approximate contrast by comparing lightness values (L component).

Tools for Manual Verification:

Post-Fix Validation Required

After applying fixes:

  1. Test all text combinations in both light and dark modes
  2. Verify UI component borders are visible
  3. Check accent colors on various backgrounds (cards, alerts, badges)
  4. Test with actual users who have visual impairments
  5. Run automated accessibility audit (Lighthouse, axe DevTools)
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