Example from the Rollo (label printer) website, there's a bulleted list of plain text that says things like "Download Windows Driver" that are clickable but in no way indicated that they are. No special color, no underline, no hover, no anything.
https://media.hachyderm.io/media_attachments/files/111/217/631/254/576/097/original/eaaba3f6ea6a359e.png