Der Bundesrat

Buttons must have discernible text

Ensure buttons have discernible text

Elements must only use permitted ARIA attributes

Ensure ARIA attributes are not prohibited for an element's role

Elements must meet minimum color contrast ratio thresholds

Ensure the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds

Frames must have an accessible name

Ensure <iframe> and <frame> elements have an accessible name

Banner landmark should not be contained in another landmark

Ensure the banner landmark is at top level

Document should not have more than one banner landmark

Ensure the document has at most one banner landmark

Landmarks should have a unique role or role/label/title (i.e. accessible name) combination

Ensure landmarks are unique