Contrast Checker
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WebAIM Accessibility Testing Services
Web accessibility testing can be difficult! The experts at WebAIM can audit your web site and provide a detailed report to help you remediate accessibility and WCAG compliance issues.
Learn more about WebAIM Evaluation Services
Explanation
Enter a foreground and background color in RGB hexadecimal format or choose a color using the Color Picker. Enter an Alpha value to adjust the transparency of the foreground color. Use the Lightness slider to adjust the perceived lightness of the color.
WCAG 2.0 level AA requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text. WCAG 2.1 requires a contrast ratio of at least 3:1 for graphics and user interface components (such as form input borders). WCAG Level AAA requires a contrast ratio of at least 7:1 for normal text and 4.5:1 for large text.
Large text is defined as 14 point (typically 18.66px) and bold or larger, or 18 point (typically 24px) or larger.
Hint:
Use the eye dropper tool in the Color Picker to extract the color value from any element on screen. Additionally,
WAVE
can analyze contrast ratios for all page text elements at once.
Use
our link contrast checker
to evaluate links that are identified using color alone.
