Color and date

Hello everyone ,



I am working on a chat programme and I was wondering how to separate the both usernames for example:



Server is me , and Client is the first man who had connected to me , so I want to be



Server to be in green color , and Client to be in Red



Server(green):Hi



Client(red):hello



Server(green):How you doin'



Client(red):Fine



.........



my second question is both of em' to have minutes and dates for example



27.05.2014 11:30pm Server(green):Hi



27.05.2014 11:31pmClient(red):hello



27.05.2014 11:32pmServer(green):How you doin'



27.05.2014 11:33pmClient(red):Fine