What is a core focus of WCAG’s perceptibility principles?

The core focus of the Web Content Accessibility Guidelines (WCAG) regarding perceptibility is centered on the visibility of content. This principle emphasizes that information and user interface components must be presented in a way that they can be perceived by users. It involves ensuring that all content is accessible through various means, allowing users to both recognize and understand the information presented to them. This includes considerations such as text size, color contrast, and alternative text for non-text content, which are crucial for users with visual impairments.

Visibility of content is vital because users must be able to see and interpret the information to engage with it effectively. Ensuring that content is perceptible allows users to interact with web interfaces regardless of their abilities or the devices they are using, thereby enhancing overall accessibility.