Our free contrast checker calculates contrast ratios as accurately as possible. However, please be aware that some color combinations might still fail overall due to other visually related factors such as hover/focus states animated effects, etc.
Required Contrast Ratios for WCAG Conformance
Level AA – Text
4.5:1 for regular text and 3:1 for large text (18 pt or 14 pt + bold).
Level AA – Non-Text
3:1 for UI components & graphics.
Level AAA – Text
7:1 for regular text and 4.5:1 for large text (18 pt or 14 pt + bold).
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