level: AAA
Level AAA is the highest level of compliance, making the most accommodations for the broadest range of people. It’s hard to achieve due to the number of rules and sometimes conflicting requirements. Successfully implement every success criterion under Level AAA, AA, and A to achieve this standard.
1.2.6 Sign Language (Pre-recorded)
All prerecorded videos have sign language interpretation.
1.2.7 Extended Audio Description (Pre-recorded)
Video is sometimes paused in order to give enough time for audio descriptions to be conveyed properly.
1.2.8 Media Alternative (Pre-recorded)
A text-based transcription of a video is offered, on top of closed captions and audio description.
1.2.9 Audio-only (Live)
Live captioning is provided for live audio.
1.3.6 Identify Purpose
Landmark regions and personalization semantics are used, allowing browser tools to remove non-essential content or add identifying icons to specific elements on the page.
1.4.6 Contrast (Enhanced)
Text has a contrast ratio of 7:1 to 1. Large text can be a 4.5 to 1 ratio if it’s over 24px, or bold and over 19px.
1.4.7 Low or No Background Audio
For spoken audio content, any background noise or music is 20 decibels lower than the foreground speech.
1.4.8 Visual Presentation
For blocks of text, justification should be avoided, line-height should be at least 1.5, width should not exceed 80 characters, and users should be able to set text and background colors.
1.4.9 Images of Text (No Exception)
Text is actual text; never images of text.
2.1.3 Keyboard (No Exception)
You can navigate and interact with a page using the keyboard alone.
