Metropol

Peoples of Metropol, I'm hoping you may be able to help with this query.

If I wanted to create a (micro) website in which the content is managed centrally and regularly updated but then each client could have their own logo, colours, name and contact details throughout on a sub-domain... what would you say?

I'm asking for a friend, obviously.

Is the actual content the same for all the sites? Just the layout/branding that's different? In which case you should be able to do that with a wordpress install, each site has its own theme, but they all use the same database for content?