Check
Contrast Checker
Pick a text color and a background color. The ratio is calculated using the WCAG relative-luminance formula and checked against the real AA/AAA thresholds — see how these thresholds are defined.
Colors
Live preview
Large text sample
Normal text sample — the quick brown fox jumps over the lazy dog.
Result
Contrast ratio
1.00
: 1
| Level | Normal text (min 4.5:1 / 7:1) | Large text (min 3:1 / 4.5:1) |
|---|---|---|
| AA | ||
| AAA |
Large text = 18pt (24px) regular, or 14pt (~18.66px) bold or larger. Ratios and thresholds per WCAG Success Criteria 1.4.3 and 1.4.11.