I was disapointed about prompt color when I install Raspbian. As user pi, you have cool green prompt. But as user root, there are no colors.
So what I want is some color for root user also. You just need to add this to files /etc/profile:
PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\] \[\033[01;34m\]\w \$\[\033[00m\] '
You can do it by one command as user root:
echo "PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u@\h\[\033[00m\] \[\033[01;34m\]\w \$\[\033[00m\] '" >> /etc/profile
If you are user pi, just add sudo before whole command. Then you will have this prompt (after you relogin).