XML XPATH - How to get attribute text where there is a colon in the tag

I have the following XML line:

< super:FirstName> Tom < /super:FirstName>

And I want to get the value of the text between the tags i.e. I only want to get "Tom".

I have tried using:

//*[name()='super:FirstName'][text()]

However this is outputting the full XML line including the tags.

Any one have any suggestions?

Thanks in advance!!!