Contrast Ratio Checker
Check color contrast against WCAG accessibility standards.
Aa Bb Cc 123
Contrast ratio17.74:1
WCAG AAPass
WCAG AAAPass
วิธีใช้
Enter your values above and read the result instantly.
วิธีการทำงาน
Everything is computed locally in your browser — nothing is uploaded.
คำถามที่พบบ่อย
Is it free?
Yes, completely free with no limits.
Is my data private?
Yes, all processing happens in your browser.