Try to do this:
<font color=blue>(url)your_url(/url)</font color=blue>
Replace round brackets with square ones - like those [ ]
I had to type like this, otherwise your_url would became clicky and you wouldn't see how it's been done. Similarly <sp?> replace <font color=red>url</font color=red> with the word <font color=green>email</font color=green> for e-mail address.
I'm doing this from memory, someone correct me if I'm wrong. http://www.made_u_click.com