Dark plasma theme, with orange and yellow gradient tones. A menu bar darker than the application menu and the rest of the widgets, rounded at its edges.
Otto Plasma theme: https://store.kde.org/p/1358262/
Otto Konsole color schemes: https://store.kde.org/p/1358261/
Otto Kvantum theme: https://store.kde.org/p/1358260/
Otto Color-schemes: https://store.kde.org/p/1358259/
Otto wallpaper: https://store.kde.org/p/1358263/