Understandable
A WCAG POUR principle: interfaces must be clear and interactions predictable to minimize confusion or errors.
More Related Accessibility Terms
Bypass Blocks
Mechanisms such as skip links and landmarks that let users jump past repeated content directly to main sections.
Character Key Shortcuts
Single‑letter keyboard shortcuts that must be remappable, turned off, or only active on focus to prevent accidental activation.
Contrast Ratio
The relative luminance of the lighter color divided by that of the darker color (each plus 0.05), from 1:1 to 21:1. WCAG AA requires 4.5:1 for normal text and 3:1 for large text and UI components.
Guideline
In WCAG, a guideline groups related success criteria under the POUR principles and provides intent and techniques.
Hover Content
Transient content that appears on hover or focus, which must be dismissible, hoverable, and persistent while being hovered.
Perceivable
One of the four WCAG POUR principles: information and UI components must be presented in ways users can perceive.
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