Supporting keyboard access to links, form controls and other interactive content is a basic requirement of accessibility since many people with disabilities cannot use the mouse and other pointing devices.
An important part of supporting the keyboard is providing a clear visual indication of keyboard focus by styling the links, form controls and other interactive elements different from the elements without focus.
The styling should use more than color changes to indicate styling.
For example, typically focus is indicated to the use by changing border styling or showing a border around the element with focus.
Keyboard support is an important part of making Web 2.0 technologies that use Javascript, HTML and CSS to create interactive widgets accessible.

Benefits to People with Disabilities

Benefits to Everyone

Related Accessibility Requirements

Section 508

Illinois Information Technology Accessibility Standards

Web Content Accessibility Guidelines (WCAG) 2.0

Web Content Accessibility Guidelines (WCAG) 1.0