Kvantum

LXQt is where the word ‘theme’ is most likely to hide three unrelated systems. Its panel and desktop use an LXQt QSS theme, Qt applications use a Qt style such as Fusion, Breeze or Kvantum, and window borders belong to whichever window manager or Wayland compositor you chose. A coherent LXQt setup is therefore a... » read more

Plasma is the desktop for people who want every visible part to be replaceable. That freedom has a cost: a ‘theme’ may mean a color scheme, a Plasma Style, a Qt widget style, an Aurorae decoration, or a bundle that merely points at all of them. Install the wrong kind and nothing appears in the... » read more