Admin Bar changes

Hi,

I would like to make changes to the Buddypress Admin Bar. What I want really is to make it more obvious. Seems people go off to a blog on the network and can't find their way back to the main site, so I think if I make the admin bar a brighter colour and perhaps longer it will stand out more. I have been reading up a little, but everything I have read was for changes to the bar only on the main site, not the entire network, would this be easy enough or would I be better off with something like WPMS Global Content?

Thanks.