Spent a while creating a rofi color scheme today, so I uploaded my .Xresources to my github. The theme is essentially a basic grey theme, designed for working with my current XFCE4 setup, with the Xfce-dusk GTK theme.
I have an XFCE4 keybinding to the Windows button on my keyboard (I know, heresy) that calls rofi in run mode, specifying the path to my .Xresources as the config file as well. The full command is:
$ rofi -config ~/.Xresources -show run