It’s not as easy as before to change background in nautilus window since gnome 2.91 development in the fall of 2010. However, we can change the background color by setting the value of gtk-color-scheme via
First install dconf-tool. Use software center or this command in terminal (Ctrl+Alt+T):
sudo apt-get install dconf-tool
Launch dconf-editor and navigate to org -> gnome -> desktop -> interface. Set the value of gtk-color-scheme and make it looks like:
Use gimp, gpick and whatever color chooser tool to pick your color names(like #ebe0be) and replace them.
To get more effects, need hacking code on “/usr/share/nautilus/nautilus.css”, “/usr/share/themes/**your-theme**/gtk-widgets.css”, read.