How to Style the Calender widget?

[savente93]

So I'm trying to style the calendar widget a bit more than just a global color change. For example I'd like the week numbers and the day names to be different colors to the rest of the days. I've dug a bit around in the GTK css documentation and found this: https://docs.gtk.org/gtk4/class.Calendar.html#css-nodes I've gotten the calendar and calendar:selected selectors to activate, even without applied classes which suggests to me that the other nodes described in the page should also be possible, but I cannot for the life of me figure out how to do it. Has anyone managed this?

[fidelski]

I am no expert but I now of the calendar:indeterminate selector (the non existing days) and there are the classes button and highlight applied. I think it's the highlight class you're looking for:

calendar.highlight {
  color: blue;
}