Follow these steps to install Greybird theme and elementary XFCE icons. This is the default theme in Xubuntu, but not in Debian and other derivatives. The following steps will give you that Xubuntu look in just 2 minutes!
# Install theme
mkdir -p ~/.themes
cd $_
wget https://github.com/shimmerproject/Greybird/archive/master.zip
unzip master.zip
rm master.zip
# Install Icons
mkdir -p ~/.icons
cd $_
wget https://github.com/shimmerproject/elementary-xfce/archive/master.zip
unzip master.zip
mv elementary*/* .
rm master.zip
# update icon cache (optional)
gtk-update-icon-cache-3.0 -f -t ~/.icons
For the Greybird theme to work, you need to:
apt-get install gtk2-engines-murrine gtk3-engines-unico
Then apply the themes in:
Settings Manager --> Appearance --> Style tab: choose "Greybird master"
Settings Manager --> Appearance --> Icons tab: choose "elementary xfce dark"
Settings Manager --> Window Manager --> Style tab: choose "Greybird master"
For the themes to work even for the root user (such as Synaptic), you can set up a symlink:
# Open a root shell
su -
ln -s /home/bdsatish/.themes /root
# Just checking
ls -A /root/.themes
Greybird-master
Reference: http://leranda.com/2011/10/how-to-install-xubuntus-xfce-theme-in-archlinux/