Configure classic UI

I am experimenting with OpenHab and have downloaded the demo site to play with.
All starts up well and I can change text labels etc which is great!

I was wondering if there is a simple way to change background colours etc of the UI?
Can I add or override a css file somewhere or add a setting to the sitemap?

Not that I’m aware of. There are other UIs that might provide more customization options but with the classic UI I think what you see is what you get.

Yeah, i’m not aware of any way to change the background.

But once you load some custom icons for the stuff in your house then it starts to look a lot nicer!