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Accessibility Glossary

WCAG criteria, patterns, and standards — with interactive demos, detection methods, and audit data.

Grid List

The first four categories — Perceivable, Operable, Understandable, Robust — are the WCAG “POUR” principles. Filter by any category to see what it covers.

132 terms

A

Accessibility Overlays Compliance Accessibility Statement Testing Accessibility Tree Interactive Robust Accessible Authentication 3.3.8 Understandable Accessible Name Essential Robust Accordion UI Patterns ADA & Section 508 Compliance Aesthetic-Usability Effect Laws of UX Affordance UX Principles Alternative Text Essential 54% audit fail rate 1.1.1 Perceivable ARIA: Use & Misuse 80% audit fail rate Robust Assistive Technology Testing Audio Descriptions 1.2.5 Perceivable Automated Testing Testing

B

Breadcrumb UI Patterns

C

Captions & Transcripts 1.2.2 Perceivable Carousel / Slider UI Patterns Choice Overload Laws of UX Cognitive Load UX Principles Color Blindness Simulation Testing Color Contrast Essential 84% audit fail rate 1.4.3 Interactive Perceivable Combobox / Autocomplete UI Patterns Conformance & Claims WCAG Levels Conformity Assessment Compliance Consistent Help 3.2.6 Understandable Consistent Identification 3.2.4 Understandable Consistent Navigation 3.2.3 Understandable

D

Dark Patterns UX Principles Data Table UI Patterns Data Visualization UI Patterns Date Picker UI Patterns Descriptive Page Title 2.4.2 Operable Designated Authority Compliance Dialog / Modal Essential 65% audit fail rate UI Patterns Disability Spectrum UX Principles Disproportionate Burden Essential Compliance Document Language Essential 16% audit fail rate 3.1.1 Understandable Document Structure Documents Doherty Threshold Laws of UX Dragging Movements 2.5.7 Operable

E

EAA Penalties Compliance Email Accessibility 77% audit fail rate Documents EN 301 549 Compliance Error Identification Essential 62% audit fail rate 3.3.1 Understandable Error Prevention 3.3.4 Understandable Error Recovery UX Principles European Accessibility Act Compliance

F

Fitts's Law Laws of UX Flow State Laws of UX Focus Appearance 2.4.13 Operable Focus Management Essential 65% audit fail rate Operable Focus Not Obscured Essential 2.4.11 Operable Focus Order 2.4.3 Operable Focus Visible Essential 68% audit fail rate 2.4.7 Interactive Operable Forced Colors & High Contrast Robust Form Input Labels Essential 49% audit fail rate 1.3.1 UI Patterns Fundamental Alteration Compliance

G

Goal-Gradient Effect Laws of UX

H

Harmonised Standards Essential Compliance Heading Structure 1.3.1 Perceivable Hick's Law Laws of UX

I

Images of Text 1.4.5 Perceivable In-Scope Services (EAA) Essential Compliance Inclusive Design UX Principles Info & Relationships Essential 60% audit fail rate 1.3.1 Perceivable Input Purpose / Autocomplete 1.3.5 UI Patterns

J

Jakob's Law Laws of UX

K

Keyboard Accessible Essential 78% audit fail rate 2.1.1 Operable

L

Label in Name 2.5.3 Understandable Landmark Regions 1.3.1 Perceivable Law of Common Region Laws of UX Law of Proximity Laws of UX Law of Prägnanz Laws of UX Law of Similarity Laws of UX Law of Uniform Connectedness Laws of UX Link Purpose 47% audit fail rate 2.4.4 Operable Live Regions Robust

M

Manual Testing Testing Market Surveillance Authority Compliance Member State Transposition Compliance Mental Model Laws of UX Microenterprise Exemption Compliance Miller's Law Laws of UX Mobile Navigation UI Patterns Motion & Animation 2.3.3 Operable

N

Name, Role, Value Essential 4.1.2 Robust Non-text Contrast 1.4.11 Perceivable

O

Occam's Razor Laws of UX

P

Pagination UI Patterns Paradox of the Active User Laws of UX Pareto Principle Laws of UX Parkinson's Law Laws of UX PDF Accessibility 72% audit fail rate Documents Peak-End Rule Laws of UX Plain Language Understandable Pointer Gestures 2.5.1 Operable Postel's Law Laws of UX POUR Principles WCAG Levels Presumption of Conformity Compliance Progressive Disclosure UX Principles

R

Readability 3.1.5 UX Principles Redundant Entry 3.3.7 Understandable Reflow 1.4.10 Perceivable

S

Screen Reader Basics Testing Seizure Safety 2.3.1 Operable Selective Attention Laws of UX Semantic HTML Robust Sensory Characteristics 1.3.3 Perceivable Serial Position Effect Laws of UX Skip Link 2.4.1 Operable Status Messages 4.1.3 Robust

T

Tabs UI Patterns Target Size 2.5.8 Operable Tesler's Law Laws of UX Text Spacing 1.4.12 Perceivable Timing Adjustable 2.2.1 Operable Toast / Notification UI Patterns Tooltip UI Patterns

U

Use of Color 1.4.1 Perceivable

V

Video Player UI Patterns Voice Control Testing Von Restorff Effect Laws of UX VPAT / ACR Compliance

W

WCAG 2.2 Overview Compliance WCAG 3.0 / Silver Compliance WCAG Level A WCAG Levels WCAG Level AA Essential WCAG Levels WCAG Level AAA WCAG Levels Web Accessibility Directive Compliance Working Memory Laws of UX

Z

Zeigarnik Effect Laws of UX Zoom & Magnification Testing Testing