I’m about to push out a new build for Gluon (20190228.3) . It will include a very early experimental “Appearance” option in Settings. When you change any values, you’ll have to press the “Reload App” button at the bottom. Wait 1 second before pressing that, otherwise the settings will not save.

Themes are Light and Dark - these change the overall skin of the app.

Accents will change link colours and colours in the tab bar and header areas.

I’ll be hopefully completing this tonight, and get it nice looking and reload on the fly (it’s nearly working but took it out for now for this build).