🌐 W3C International Standard

What Does WCAG
Stand For?

WCAG Meaning

WCAG stands for Web Content Accessibility Guidelines. These are international standards developed by the W3C Web Accessibility Initiative (WAI) that define how to make web content accessible to people with disabilities. WCAG is referenced by accessibility laws worldwide including ADA, AODA, and Section 508.

WCAG Quick Facts

Essential information about the global web accessibility standard

Latest Version

WCAG 2.2

Released October 2023

Global Standard

ISO/IEC

40500:2012 International Standard

Legal Standard

AA Level

Required by most accessibility laws

POUR Principles

4 Core

Perceivable, Operable, Understandable, Robust

WCAG Version History

1999

WCAG 1.0

Legacy

First version with 14 guidelines and priorities

2008

WCAG 2.0

Current

Introduced POUR principles and three conformance levels

2018

WCAG 2.1

Current

Added mobile accessibility and cognitive disability support

2023

WCAG 2.2

Latest

Enhanced mobile auth and improved accessibility

WCAG Conformance Levels Explained

WCAG defines three levels of conformance: A, AA, and AAA. Most accessibility laws require Level AA.

A

Level A

Minimum

Basic accessibility features that don't significantly change website design

Key Requirements:

Alt text for images
Keyboard access
Basic contrast
AA

Level AA

Standard

Standard level required by most laws (ADA, AODA, Section 508)

Key Requirements:

4.5:1 color contrast
Resize text to 200%
Focus indicators
AAA

Level AAA

Enhanced

Highest level with stringent requirements, rarely required by law

Key Requirements:

7:1 color contrast
Sign language videos
3-second time limits

Related Accessibility Standards

ADA Compliance

US federal law that references WCAG for website accessibility

AODA Compliance

Ontario law requiring WCAG 2.0 Level AA compliance

Section 508

US federal procurement standard based on WCAG

WAI Standards

Web Accessibility Initiative that creates WCAG

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