gtk's config file is at for example ~/.gtkrc-2.0
It has in it some thing like
Code:
gtk-icon-theme-name="Tango"
gtk-theme-name="dark"
#gtk-toolbar-icon-size = GTK_ICON_SIZE_SMALL_TOOLBAR
gtk-icon-sizes = "panel-menu=16,16:panel=16,16:gtk-menu=16,16:gtk-large-toolbar=20,20:gtk-small-toolbar=16,16:gtk-button=16,16"
That names the icon theme, desktop theme, icon size etc. to use.
Then desktop thems are at ~/.themes/dark for the above example.
~/.themes/dark will have /gtk-2.0/gtkrc in it.
gtkrc is the config for your desktop theme.
As far as the icom theme, do a search on your box for where linux keeps them.
Then as for styles that's up to your windows mgr, and it's styles config files.