#!/bin/bash GTKDARK="Numix-BLACK-Pomegranate" GTKLIGHT="Orchis-Teal" case "$1" in light) gsettings set org.gnome.desktop.interface color-scheme prefer-light gsettings set org.gnome.desktop.interface gtk-theme "$GTKLIGHT" ;; dark) gsettings set org.gnome.desktop.interface color-scheme prefer-dark gsettings set org.gnome.desktop.interface gtk-theme "$GTKDARK" ;; *) exit 0 ;; esac