Validate foreground and background color pairings for web accessibility standards.
Colors Selection
Curated Presets
Contrast Ratio
17.06:1
ACCESSIBLEAA Normal Text
Ratio ≥ 4.5
AAA Normal Text
Ratio ≥ 7.0
AA Large Text
Ratio ≥ 3.0
AAA Large Text
Ratio ≥ 4.5
UI Components
Ratio ≥ 3.0
1 Why Contrast Matters
Good color contrast ensures that text is readable for everyone, including users with visual impairments, color blindness, or those viewing screens in direct sunlight.
2 WCAG 2.1 Guidelines
Level AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. Level AAA requires at least 7:1 for normal text and 4.5:1 for large text.
3 Inclusive Design
By verifying accessibility contrast ratios early in the design phase, you prevent UX issues and make sure your platform complies with standard accessibility laws.
Understanding Color Contrast & Web Accessibility
Web content accessibility is essential for creating inclusive digital products. Color contrast refers to the difference in luminance or color between the active text (foreground) and the backdrop it is written on (background).
Our tool helps you test contrast dynamically using the relative luminance calculations defined by the W3C. This guarantees that your color palettes are compliant with international standards, helping you pass accessibility audits and build better products.
WCAG 2.1 Accessibility Checklist
- 1
AA Normal Text (Passes at ≥ 4.5:1)
Essential for standard body text, captions, and general paragraph elements under 18pt (24px) in size.
- 2
AAA Normal Text (Passes at ≥ 7.0:1)
The highest standard of accessibility, ensuring maximum legibility for body text.
- 3
AA Large Text (Passes at ≥ 3.0:1)
Applies to headings, large titles, or bold text over 14pt (approx. 18.6px) or regular text over 18pt.
- 4
UI Components & Icons (Passes at ≥ 3.0:1)
Includes borders of input elements, visual status indicators, active buttons, and custom SVG icons.
Related Tools
More helpful utilities under the Design & Color Tools category.