I am exporting org-mode files using org2blog, and I have this in my
org-file - 

#+BEGIN_SRC bash
## Repos for plank
# for wheezy users
deb http://people.ubuntu.com/~ricotz/debian-plank wheezy main
# for jessie and sid users
deb http://people.ubuntu.com/~ricotz/debian-plank sid main
#+END_SRC

which comes out okay except it is not coloured. How can I get the
exported source code to have a colour appropriate to whether its bash,
or text, or python, or whatever please?

Thanks
Sharon.
-- 
A taste of linux = http://www.sharons.org.uk
my git repo = https://bitbucket.org/boudiccas/dots
Debian testing, Fluxbox 1.3.5, emacs 24.3.1
Registered Linux user 561944