If it is a gtk app it will use the gtk mechanism, if it is a qt app it will use the qt mechanism, otherwise your in luck, you get to use the native X11 mechanis

If it is a gtk app it will use the gtk mechanism, if it is a qt app it will use the qt mechanism, otherwise your in luck, you get to use the native X11 mechanism. gtk: hell if I know, the web sez there are css files, and there are probably some gnome tools to set the theme. qt: no clue. and the web was unhelpful native X11: now we are talking I know this one, X11 provides a database that applications can use for configuration and design. The main interface is the xrdb command. and all good application should include the pertinent points of their call tree to get you started in theming them. http://man.openbsd.org/xrdb http://man.openbsd.org/xrdb