Open your terminal, and enter :
nano ~/.bash_profile
It will open your profile file (file that contains your PATH exports, preferences ...)
Add the following lignes to the file :
export PS1="\[\033[36m\]\u\[\033[m\]@\[\033[32m\]\h:\[\033[33;1m\]\w\[\033[m\]\$ "
export CLICOLOR=1
export LSCOLORS=ExFxBxDxCxegedabagacad
Save changes (in Nano) by typing ctrl + X
then, Yes
Quit and re-open your terminal. Enjoy !