Logos are used for branding web resources. Accessibility requires that the ALT property of the logo's IMG tag is set to the full name of the indicated organization.
A logo for the University of Illinois:
Acceptable markup for this image is:
One may add optionally add the TITLE property in addition to the ALT property. Many visual browsers will display TITLE information when the mouse is hovered over the image.
Unacceptable examples of ALT text are:
- "Illinois", because the description does not uniquely identify the organization nor does the description indicate the image is performing a branding function
- "A white 'I' on a blue background to the left of the word 'Illinois'", because the logo is intended to indicate an organization, and not visual content