How to set default emacs background and foreground colors?

Add the following to your .emacs:

(add-to-list 'default-frame-alist '(foreground-color . "#E0DFDB"))
(add-to-list 'default-frame-alist '(background-color . "#102372"))

You might want to look at http://www.emacswiki.org/emacs/FrameParameters and the links therein.