Page alerts are used to notify users of important information or changes on a page, in a way that attracts the user's attention without interrupting the user's task. Typically they appear at the top of a page following a submit action.
How the page alerts are viewed with various colour blindnesses
How the page alerts are viewed with total colour blindness.
How keyboard navigation works with page alerts.
[Heading level 3] Alert title.
Alert Content [link] link.
How the page alerts demo is described by assistive technology.
As read with macOS High Sierra VoiceOver.