Improvising a button in a Google Doc workflow template

I need to have a clear call to action in an email sent by a workflow, and that call to action is to a programmatic link that changes with every email.

So as far as I can tell, I need to use the HYPERLINK() function, and that function has to be inline in the document, it can’t be used in the google doc’s native add link window.

Assuming there isn’t an IMAGE() function I can use inside the HYPERLINK() function, this would mean to improvise a button, my tools are text formatting and tables.

That should suffice but it’d be really nice if I could at least change the color of the hyperlink, ideally also the text-decoration to remove the underline, otherwise I’m cornered into “buttons” that look like this:

Possible? Thoughts on alternatives?