Color Contrast Checker - WCAG Accessibility Test
UtilitiesFree online color contrast checker tool that tests foreground-background contrast ratio, validates WCAG AA/AAA standards, and auto-suggests accessible colors
TL;DR:Free online color contrast checker that validates WCAG AA/AAA accessibility standards, auto-suggests accessible colors with real-time preview. Runs locally in your browser, no registration required.
FAQ
Completely free, no registration required. Check color contrast directly in your browser — all calculations run locally with no usage limits.
Based on WCAG 2.1 standards, checking both AA (4.5:1 / 3:1) and AAA (7:1 / 4.5:1) contrast requirements for normal and large text respectively.
No. All contrast calculations are done locally in your browser. Your color selections are never uploaded to any server.
Yes. The tool automatically calculates and suggests accessible color adjustments that meet the standards. You can apply the suggested colors with one click.