DocSuite/Contrast Checker

WCAG Contrast Checker

Enter foreground and background colours to instantly see their contrast ratio and WCAG 2.1 AA/AAA compliance. Essential for accessible design.

Colours
Quick Presets
Preview

Large Text (18pt Bold)

Normal text at 14px — The quick brown fox jumps over the lazy dog. This is a sample sentence to evaluate readability.

Small/UI text · 12px · Monospace

Contrast Ratio
:1
1:1 (fail) 3:1 AA Large 4.5:1 AA 7:1 AAA 21:1 max
🔒 All calculations run entirely in your browser. No data is sent anywhere.