Cryptic headline? For linux users only. If you’d like to have a more colorful way of presenting your diskfree status, then try out python diskfree.
sudo aptitutde install pydf
Accordingly to your distribution, try sudo ln -s /usr/bin/pydf /usr/bin/df to make it your default df statement. This works, because of ordering of the $PATH variable and the fact, that ordinary df binary is placed at /bin/df which is situated at the last position in the $PATH ordering.