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WCAG 2.1 AA & AAA Compliance Standards • Instant Mathematical Calculation

Website Color Contrast &
Readability Checker.

Ensure your website typography is readable for all visitors and passes official Web Content Accessibility Guidelines (WCAG 2.1) without guesswork.

Sample Palettes:

Select Colors

Contrast Ratio
19.36: 1
Normal Text (Body)Minimum 4.5:1 required
AA PassAAA Pass
Large Text (Headings 18pt+)Minimum 3.0:1 required
AA PassAAA Pass
UI Components & IconsMinimum 3.0:1 required
AA Pass

Simulated User Interface

Live CSS Color Application
Interactive Component Preview

Accessible Typography for Everyone

Good contrast ensures that your content is effortlessly legible in direct sunlight, on budget mobile screens, and for individuals with mild to severe visual impairments.

Text: #FFFFFF • Background: #0D0D14 • Ratio: 19.36:1
The 4.5:1 Rule of Thumb

Web Content Accessibility Guidelines (WCAG) 2.1 level AA requires a contrast ratio of at least 4.5:1 for normal body text and 3:1 for large text (at least 18pt or 14pt bold). Aiming for 7:1 achieves enhanced AAA accessibility.