This is a color theme that matches Skewaita GTK theme. It's a gray theme, easy on the eyes, with bright green accents. Widgets such as Oxygen, QtCurve Fusion or Breeze won't show pressed/toggled buttons with the accent color, so it's not a perfect match for the GTK theme (you might want to use Greybird regenerated darker accent Kvantum theme if that's what you want, or play with some QSS if you use qt5ct or qt6ct to set Qt style).
Disabled elements have a reddish/brownish tone, so they are clearly distinguishable.

Preview is from GTK theme.