Perceivable - Perceiving the portal page

1. Perceivable

1. Perceivable

"User interface information and components must be presented to users in a way that they can perceive." (WCAG)

The "Perceivable" principle is about users being able to perceive information and components on portal and application pages with at least one of their senses. For example, if a user is blind, then there should be the possibility for them to hear information with screen readers instead of seeing information. This is achieved primarily by storing text alternatives for graphics or, if necessary, buttons, which are then read aloud by screen readers.

For users with impaired vision, it is critical that color contrasts, font sizes, line spacing, and character spacing be sufficiently large. For people with a deficiency in distinguishing red and green, it is important to use colors that are distinguishable for them.

To describe perceivability better while distinguishing its different aspects, the following four guidelines are available:

  • Text alternatives

    This is about providing text alternatives for non-textual elements such as images, graphics and, where appropriate, buttons.

  • Time-based media

    The item "Time-based media" was only included here for the sake of completeness, since it is not relevant to Intrexx. Intrexx does not provide original time-based media. If you do use such media, be sure to provide perceivable alternatives. These can include subtitles for videos, for example.

  • Adaptable

    Adaptability is about the clear structure of a portal or application page. A structure that uses headings plays an important role here. It includes adaptability for different screen displays which is available automatically in Intrexx once you create responsive pages with the Page Wizard, for example.

  • Distinguishable

    The aim here is to make it as easy as possible for the user to distinguish content. This involves the use of sufficient contrast, for example.

The aspects described in the four guidelines are not always sharply delineated. Rather, they complement each other.

The four guidelines and their implementation in Intrexx are described in the following sections.