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WCAGAAA

2.4.13 Focus Appearance — When the keyboard focus indicator is visible, an area of the focus indicator meets all the following:

WCAG references
  • 2.4.13 Focus Appearance (AAA)

Official methodology to test criterion 2.4.13

Test 1 (2.4.13)

  1. ulist:
    • is at least as large as the area of a 2 CSS pixel thick perimeter of the unfocused component or sub-component, and
    • has a contrast ratio of at least 3:1 between the same pixels in the focused and unfocused states.
  2. ulist:
    • The focus indicator is determined by the user agent and cannot be adjusted by the author, or
    • The focus indicator and the indicator's background color are not modified by the author.