Okies, let's try this then:
The blue is the background of the window. The white border, is the border for the windowskin. The four small arrows are for talking (the little bouncy down arrow when people speak in games to show you can push the action button). We won't be using the larger arrows (which are for selecting targets in the battle system). And finally, the square next to the four small arrows is the choice highlighter.
I'm sure you know all this already, though.
I think the theme should definitely be music, still with dark browns and purples/blues. :D
I shall wish you luck as you try! ^_^