About

Version: WCAG 2.0+
Number: 1.4.3
Level: AA
Applicability:
  • Text
  • Images of Text
Requirement:

The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following:

View exceptions
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.

Guidance:

Purpose

The purpose of this success criterion is to ensure that users with moderately low vision (approximately 20/40) can discern the text from its background.

How to Meet

Authors must ensure that the contrast ratio between text (including images of text) and backgrounds is at least 4.5:1.

Additional Information

The following knowledge base pages provide more information about how to address this success criterion for publishing content: