Color Contrast Checker
Input Colors
Results
Check Color Contrast Instantly
Meet WCAG Standards
Ensure your website is accessible and readable for everyone. The #1 free Color Contrast Checker for designers, developers, and SEO pros.
Try: foreground #F97316 on background #1E293B
Accessibility isn't optional — it's your competitive edge
Poor contrast excludes millions of users and exposes you to legal risk. SEOScaleUp's Color Contrast Checker instantly validates foreground/background pairs against WCAG 2.1 levels A, AA, AAA.
Stop guessing, start designing inclusively — with detailed ratio analysis and fix suggestions.
Engineered for precision & speed
Everything you need to audit color contrast like a pro.
Real-time Ratio
As you type HEX or pick colors, see contrast ratio update live with pass/fail badges.
WCAG 2.1 Levels
Checks AA (normal/large) and AAA criteria with clear visual indicators.
Color Blind Sim
Preview how contrasts appear for protanopia, deuteranopia, tritanopia.
History & Palettes
Save recent checks and generate accessible color palettes.
APCA Contrast
Advanced Perceptual Contrast Algorithm for modern readability.
Export Report
Generate PDF accessibility reports for stakeholders.
Check contrast in three clicks
No learning curve, just accessibility.
Pick Colors
Enter foreground & background
Auto Analyze
Get ratio & WCAG verdict
Adjust & Fix
Suggestions to meet AA/AAA
Export & Share
Save report for audit
Why accessibility grows your business
Higher rankings, larger audience, lower legal risk — contrast checking is a superpower.
Google prioritizes accessible sites; clear contrast improves dwell time.
ADA Title III compliance starts with WCAG contrast standards.
Readable CTAs increase click-through rates dramatically.
Built for every role in digital
Tailored workflows for design, development, marketing, and leadership.
UI/UX Designers
- Create accessible design systems
- Test brand colors instantly
- Generate accessible tints/shades
- Share contrast reports with clients
- Export accessible palettes to Figma
Frontend Devs
- Integrate into stylelint pipeline
- Automate contrast audits
- Remediate legacy CSS
- Component-level testing
- WCAG 2.1 badge for docs
SEO & Marketers
- Improve Core Web Vitals signals
- Reduce bounce rate via readability
- Accessibility as ranking factor
- Competitor contrast gap analysis
- Boost organic traffic by 12%
Legal & Compliance
- Prove WCAG conformance
- Generate audit-ready reports
- Monitor ongoing compliance
- Reduce litigation exposure
- Meet Section 508 standards
Trusted by 10,000+ teams
More accurate, faster, and completely free.
No signup walls
Start checking instantly — zero friction, unlimited use.
APCA advanced
Better than WCAG 2.x for modern displays and dark mode.
Real data, real fix
Actionable suggestions, not just pass/fail.
Why we outperform alternatives
| Feature | SEOScaleUp ✓ | Manual Calc | Premium Tools ($99+) |
|---|---|---|---|
| WCAG 2.1 AA/AAA | ✓ Full | ✗ Error prone | ✓ Limited |
| APCA contrast | ✓ Included | ✗ | ~ Extra fee |
| Color blindness sim | ✓ Real-time | ✗ | ✓ |
| Export reports | ✓ PDF/CSV | ✗ | ~ Limited |
| Batch URL audit | ✓ Unlimited | ✗ | ✓ |
| API access | ✓ Free tier | ✗ | ~ Expensive |
| Suggested fixes | ✓ Smart | ✗ | ✓ |
| Dark mode preview | ✓ Native | ✗ | ~ Beta |
| Price | $0 Forever | $0 | $99+/mo |
Answers about contrast checking
Ready to make your content visible to everyone?
Join thousands of teams who rely on SEOScaleUp for WCAG contrast compliance.
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