Level AA
The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following:
- 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.>
Explanation
Text must have a contrast ratio of at least 4.5:1 against its background colour. This makes content easier for everyone to read, but especially people with low vision and people in poor lighting conditions.
Responsibilities
- Design
- QA
Requirements
- Text (whether plain text or in an image) has a contrast ratio of at least 4.5:1 against its background colour.
Common mistakes
- Text does not have a contrast ratio of at least 4.5:1 against its background colour.