Developer Utility
Color Contrast Checker Tool
Check contrast ratio between foreground and background colors with AA/AAA results.
Language: CSSUtility: CompareUtility: ValidateUtility: Inspect
Accessibility Preview Text
The quick brown fox jumps over the lazy dog.
Foreground: #111827 Background: #ffffff Contrast ratio: 17.74:1 WCAG AA (normal text): Pass WCAG AA (large text): Pass WCAG AAA (normal text): Pass WCAG AAA (large text): Pass
What This Tool Does
Check foreground/background contrast and quickly see WCAG AA/AAA pass status.
Use it to inspect or transform input quickly, then carry validated output into code, tests, or API requests.
Common Use Cases
- Validate text contrast before shipping UI changes.
- Test alternative brand colors for accessibility compliance.
- Debug low-contrast combinations in existing components.
Common Pitfalls
- Contrast ratio is one part of accessibility, not the full picture.
- Real rendered weight/size can affect practical readability.
FAQ
Does this show AA and AAA results?
Yes, it reports normal and large text pass/fail levels.
Can I quickly try alternate colors?
Yes, inputs update the ratio and badges immediately.
Does this tool send data to a backend?
Most tools process input client-side in your browser unless explicitly noted.