Wcag focus indicator contrast

1. What is the minimum contrast ratio for focus indicator?
2. What is the focus indicator?
3. What is the accessibility principle and intent of SC 2.4 7 focus visible?
4. What is the purpose of testing for 2.4 7 focus visible?

What is the minimum contrast ratio for focus indicator?

Check that the visual presentation of the focus indicator has a contrast ratio of at least 4.5:1 against the immediate surrounding color(s).

What is the focus indicator?

A focus indicator is a visual indicator that “highlights” the currently focused element. This visual indicator is commonly presented as an outline around the element.

What is the accessibility principle and intent of SC 2.4 7 focus visible?

Specific Benefits of Success Criterion 2.4. 7: This Success Criterion helps anyone who relies on the keyboard to operate the page, by letting them visually determine the component on which keyboard operations will interact at any point in time.

What is the purpose of testing for 2.4 7 focus visible?

The purpose of this success criterion is to help a person know which element has the keyboard focus. “Mode of operation” accounts for user agents which may not always show a focus indicator, or only show the focus indicator when the keyboard is used.