Change the GTK theme
From Granular Linux Documentation
Granular 1.0 includes a nifty little utility to switch the default GTK theme, using an easy-to-use interface, to the one of your choice. Granular's default GTK theme is Nodoka, but includes plenty others pre-installed. To change the theme, open up command-line (Konsole) and issue the command gtk-chtheme.

