Perceivable
One of the four WCAG POUR principles: information and UI components must be presented in ways users can perceive.
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
Numeric ratio expressing luminance difference between two colors. Common thresholds: 4.5:1 for normal text, 3:1 for large text or UI.
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.
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