The colour contrast on all text must have a contrast ratio to the background of at least 4.5:1.
Refer to Module 2: Screen layout, checkpoint 20 for font colour requirements for main content.
Benefits of conformance
- Increases readability.
- Dark coloured fonts on white or light coloured backgrounds enhances readability.
Risks of non-conformance
- Lower colour contrast can make text unreadable.
- Light fonts on dark backgrounds reduce readability.
Heading 1 text may have a colour contrast of 3:1 or greater. Refer to Module 2 – Screen layout, Checkpoint 18 – Page title.
Correct implementation: colour contrast is 15.1:1
Incorrect implementation: colour contrast is 1.3:1.