Do you know where is the source of problem? Different definition of
color used for background and background under text?

This is relevant part of my .emacs file.

(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(default-frame-alist (quote ((foreground-color . "Wheat") (background-color . "dark slate gray") (width . 204) (height . 58)))))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(default ((t (:inherit nil :stipple nil :background "dark slate gray" :foreground "Wheat" :inverse-video nil :box nil :strike-through nil :overline nil :underline nil :slant normal :weight normal :height 101 :width normal :foundry "unknown" :family "Droid Sans Mono")))))

I use emacs from ubuntu:

GNU Emacs 24.3.1 (x86_64-pc-linux-gnu, GTK+ Version 3.10.7) of 2014-03-07 on lamiak, modified by Debian

-- 
Tomasz