TechTensteinBrowser-only accessibility check
Color contrast checker.
Compare foreground and background colors against common WCAG 2.2 thresholds. No color values are sent to TechTenstein.
The quick brown fox jumps over the lazy dog.
Contrast ratio: 13.8:1Enter two six-digit hex colors to calculate.
Method and source
The calculator converts sRGB channel values to relative luminance and applies the WCAG contrast-ratio formula. Threshold labels are based on WCAG 2.2 Success Criterion 1.4.3 and Success Criterion 1.4.11. Always review the complete applicable standard and test the implemented interface.