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WCAG 2.1 Color Contrast & Accessibility Ratio Checker
Calculate exact relative luminance and contrast ratio between text and background colors with instant AA and AAA compliance badges for body, headings, and UI elements.
tool id:wcag-contrast-checker
Curated Contrast Presets:
Relative Luminance: 0.0126
Contrast Ratio
15.81:1
AAA Superior Compliance
Relative Luminance: 0.9399
WCAG 2.1 Compliance Status
Normal Body Text
< 18pt or < 14pt bold
Level AA (4.5:1) PASS
Level AAA (7.0:1) PASS
Large Headings
≥ 18pt or ≥ 14pt bold
Level AA (3.0:1) PASS
Level AAA (4.5:1) PASS
UI Components & Icons
Borders, icons, states
Level AA (3.0:1) PASS
Ensures input borders, focus indicators, and essential graphic elements remain perceivable.
Real-Time Visual Preview
Large Headline Text (18pt Bold)
This is normal body text (14pt regular). Accessible contrast ensures people with visual impairments, color deficiencies, or viewing screens in bright sunlight can comfortably read your content without eye strain.
Status Tag
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