Creating styles for user-defined runs?

I’ve been able to style runs for links and tags etc. Is there any way to style based on regex or otherwise defining a custom run to be styled?

What I’d like to do is to have a Markdown link that looks like

[Reflections on reading Hart 2016](ulysses://x-callback-url/open?id=rPBnDJ5fsH-dfdld6NXvoA)

appear with the link title in a contrasting colour.

Sorry there isn’t.