Here's a workaround from Ed Hurst: Gtk2 and Gnome2 Applications Outside Gnome2.
Fonts: Create a config file in your home directory -- ~/.gtkrc-2.0. In this file, place one simple line:
gtk-font-name = "Arial 12"
Theme: To get the color scheme you like, choose one that is available on your system -- /usr/share/themes in SuSE/Fedora -- and make sure it is indeed Gtk2, as not everything there is. Edit ~/.gtkrc-2.0 and add a line like this one:
This is my ".gtkrc-2.0":
gtk-font-name = "Sans 12"
Have fun with KDE! :)