You can tweak and theme also the borders of the tiled windows.
Search for “theme” and you will find init_layout_theme.
That will be the initial look for qtile. It is like a standard template.
You can define a theme PER LAYOUT.
- MonadTall
- MonadWide
- …
That is super flexible.
You can change your layout in the menu or press SUPER + Spacebar.