https://www.reddit.com/r/hyprland/comments/1h4abmt/how_do_i_apply_dark_theme/

需要注意的是，这里的第二个设置，需要改成 adw-gtk3-dark ，不然的话，是不生效的。

# for libadwaita gtk4 apps you can use this command:
exec = gsettings set org.gnome.desktop.interface color-scheme "prefer-dark"   # for GTK4 apps

# for gtk3 apps you need to install adw-gtk3 theme (in arch linux sudo pacman -S adw-gtk-theme)
exec = gsettings set org.gnome.desktop.interface gtk-theme "adw-gtk3-dark"   # for GTK3 apps

# for kde apps you need to install: sudo pacman -S qt5ct qt6ct kvantum kvantum breeze-icons   
# you will need to set dark theme for qt apps from kde more difficult thans with gnome :D:
env = QT_QPA_PLATFORMTHEME,qt6ct   # for Qt apps# Theme