Open Terminal and type:nano .bash_profile
At the bottom of your .bash_profile, add these lines and save the file.
NOTE: If you use a Dark terminal theme, use this:export CLICOLOR=1
export LSCOLORS=GxFxCxDxBxegedabagaced
NOTE: If you use a Light terminal theme, use this:export CLICOLOR=1
export LSCOLORS=ExFxBxDxCxegedabagacad
Once your .bash_profile is saved, enter the command below:
ls -alh
The output should now be in different colors.