Techniques for WCAG 2.0

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G156: Using a technology that has commonly-available user agents that can change the foreground and background of blocks of text

Applicability

All technologies

This technique relates to:

User Agent and Assistive Technology Support Notes

Most browsers allow the user to change the color settings to override Web author's CSS and HTML color schemes. This includes IE, all versions of Firefox, Mozilla, and Opera after version 6.

Description

Some people with cognitive disabilities require specific color combinations of foreground text and background to help them successfully understand the contents of the Web page. Most popular browsers provide the option to change colors settings globally within the browser. In this case the colors selected by the user override the foreground and background colors specified by the Web author.

In order to meet this success criteria, the Web author would design the page so that it works with browsers that have these controls, and the author does not override these controls.

Examples

Resources

Resources are for information purposes only, no endorsement implied.

Tests

Procedure

  1. Open the Web page in a browser that can change colors.

  2. Change the foreground and background colors in the browser settings so they are different than those specified in the content.

  3. Return to the page and check that that the new specified foreground text and background colors in the browser override the colors specified in the content.

Expected Results