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RAPDFAA

How to test criterion 2.3 “Are the colours used in the graphic elements conveying information sufficiently contrasting (excluding special cases)?”

WCAG references
  • 1.4.11 Non-text contrast (AA)
Pdfua
  • 8.9.2.4.13 Widget

Official methodology to test criterion 2.3

Test 1 (2.3.1)

Does the contrast ratio of each colour required to understand a graphic element with the adjacent colours, meet one of these conditions (excluding special cases)?

  • The contrast ratio is at least 3:1.
  • A replacement mechanism allows graphic elements to be displayed with sufficient contrast.

Test 2 (2.3.2)

Does the contrast ratio of each colour required to understand a graphic element with the background colour meet one of these conditions (excluding special cases)?

  • The contrast ratio is at least 3:1.
  • A replacement mechanism allows graphic elements to be displayed with sufficient contrast.

Test 3 (2.3.3)

Does the contrast ratio between the colours of a graphic element in its different states meet one of these conditions (excluding special cases)?

  • The contrast ratio is at least 3:1.
  • A replacement mechanism is used to display graphic elements with sufficient contrast.