I shipped a button whose label was invisible. Same colour as its own background — 1:1 contrast, no readable text at all. It was only broken in dark mode, and my CI was green the entire time.
Source: [Dev.to](https://dev.to/henrique_yuri_f42f2fca47a/text-at-11-contrast-is-not-an-axe-violation-it-is-incomplete-436c)