1.4.3 Contrast (Minimum) Level AA

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Conformance Levels

Description

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 minimum contrast requirement.

[View on W3C.org]

Questions & Answers

Does dynamically changing text color meet accessibility requirements?

My website has text that changes color as you scroll. Text at the bottom of the screen is lightly colored, and is below minimum contrast. However, as the user scrolls, the text becomes darker and meets minimum contrast once it reaches the top half of...

  • contrast
  • interactive
  • text

When can text links have 3:1 color contrast?

Some sites say link text color contrast should be 4.5:1, and some sites say link text color contrast should be 3:1. When is 3:1 color contrast sufficient for link text?

  • contrast ratios
  • links
  • text

What WCAG color contrast guidelines apply to sub brand logos?

Our team is designing logos for a medical brand and we understand that LOGOS (assume primary logos, such as the Amazon logo) do not need to be ADA-Compliant, but what about subbrands that are typed out such as HEALTH BRAND | Insurance Plans?

  • branding
  • color
  • contrast
  • contrast ratios
  • text

Company colors don’t pass contrast guidelines.

The company colors don't pass contrast guidelines, and the entire site is built on that color scheme. Are there any exceptions to this rule, and if so, what would you suggest?

  • branding
  • color