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WCAGAA

1.4.3 Contrast (Minimum) — The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following:

WCAG references
  • 1.4.3 Contrast (Minimum) (AA)

Official methodology to test criterion 1.4.3

Test 1 (1.4.3)

  1. ulist:
    • Large Text:Large-scale text and images of large-scale text have a contrast ratio of at least 3:1;
    • Incidental:Text or images of text that are part of an inactive user interface component, that are pure decoration, that are not visible to anyone, or that are part of a picture that contains significant other visual content, have no contrast requirement.
    • Logotypes:Text that is part of a logo or brand name has no contrast requirement.