How do I set the color of terminal bash prompt and background based on user or system profile ?

Issue

• How to setup user or system profile to give user's different colored bash prompt  ?  So that when user login to different servers via ssh, they can identify between two machine based on terminal bash prompt color.

• For example, Red terminal prompt for production servers, Green terminal prompt for test servers.

• Note this will not change the background color of the entire screen - just the prompt line. The background color needs to be set by the terminal emulator settings (e.g. putty)