Need to add back ground color to my shell

what about this? http://www.mono-project.com

Sorry, wrong link :)
http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/
http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x329.html
http://www.linuxquestions.org/questions/*bsd-17/bash-color-shell-41393/

This is the link I save to remember what color options are available in Bash.

http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/

Hope this helps you!

can some one pls give me a sample code instead of i just want to include to my (.bash_profile) file
instead of sending links that i should go thru one by one

The idea of providing a link is to let you go through it so you can take what you need.
Here's an example, but you must take a look at the links to understand and choose what you want.
This is an extract from my first link:
Task: How to make the prompt setting permanent

Your new shell prompt setting is temporary i.e. when you logout setting will be lost. To have it set everytime you login to your workstation add above export command to your .bash_profile file or .bashrc file.
$ cd
$ vi .bash_profile
OR
$ vi .bashrc
Append export line:
export PS1="\e[0;31m[\u@\h \W]\$ \e[m"

Save and close the file.

Set up your terminal emulator (xterm or the like).  Any \e tricks aren't permanent enough.