Differentiate between accent label and link buttons
It's not immediately clear at the moment what is a link button and what is an accent colored label
I'm leaning towards just always underlining link button labels. Right now you have to hover to get the underline (and pointer cursor), which means that's not accessible on touch. We don't use link buttons a ton, so it won't add underlines all over the place, but it does mean they're a little more visually noisy.
What about having the underline be a bit more subtle? I'm not sure what's possible and what isn't, but maybe setting the underline opacity to be 80% would make it feel less aggressive (similar to how the new GTK text highlight colour is softer compared to the old stylesheet)
@hanaral afaict that's not possible in GTK or even CSS; we would have to use a border instead of an underline text style, but that gets finicky because it doesn't take into account the text itself.