You can install dconf-tools
from Software Manager and experiment with this:http://askubuntu.com/questions/65759/how-do-i-set-the-background-color-pattern-in-a-nautilus-window
I just changed org.gnome.desktop.interface > gtk-color-scheme
I put base_color:#abc5d7
in the line to get this effect -
So it doesn't just
change nemo's window background colour, it does affect eg. input boxes as well, so font colour might then be a problem depending on
the background colour you choose.
This was in LM14 Cinnamon, Nemo 1.1.2.