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