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.
2.4.13 Focus Appearance
The visible focus indicator must be at least 2px thick, have a contrast ratio of 3:1 compared to the unfocused state, and be clearly connected to the focused element.
2.5.5 Target Size (Enhanced)
Targets for touch or mouse must be at least 44×44px, unless they are part of a sentence or block of text, near another target with the same function that meets the size, or in a context where size can’t be increased.
2.5.6 Concurrent Input Mechanisms
It must be possible to switch between input types (mouse, keyboard, touch, voice) without losing access to any functionality.
3.1.3 Unusual Words
Unusual terms, jargon, or figurative language should be avoided when possible, or explained the first time they appear.
3.1.4 Abbreviations
Abbreviations and acronyms should be avoided when possible, or explained the first time they appear.
3.1.5 Reading Level
If content requires reading skills above lower secondary education (around 9th grade), provide a simpler version, a summary, a visual aid, or a spoken version to help with understanding.
3.1.6 Pronunciation
If a word can be pronounced in different ways with different meanings, the intended meaning must be clarified to avoid confusion or ambiguity.
3.2.5 Change on Request
Major changes (like open dialog, navigate, submit) must only happen when explicitly requested.
3.3.5 Help
Provide additional help (like text instructions, help links, or tooltips) when label alone might be ambiguous or confusing.
3.3.6 Error Prevention (All)
Before submitting, all forms must allow reviewing the input, correcting mistakes, or confirming.
