When you run heroku command on a staging server it will be yellow, else it will be red.

Change color of terminal when running heroku commands

SELECTED_TAB=$(osascript -e "tell application \"Terminal\" to get selected tab of window 1")
ALL_ARGS="'$*'"
if [[ $ALL_ARGS =~ stg|staging ]];
  then
    echo "matches"
    osascript -e "tell application \"Terminal\" to set background color of $SELECTED_TAB to {65280, 49408, 1792}";
    osascript -e "tell application \"Terminal\" to set normal text color of $SELECTED_TAB to {0, 0, 0}"
  else
    echo "doesn't match"
    osascript -e "tell application \"Terminal\" to set background color of $SELECTED_TAB to {56320, 13568, 17664}";
    osascript -e "tell application \"Terminal\" to set normal text color of $SELECTED_TAB to {65280, 65280, 65280}"
  fi

/usr/local/bin/heroku $@;

osascript -e "tell application \"Terminal\" to set background color of $SELECTED_TAB to {0, 0, 0}";
osascript -e "tell application \"Terminal\" to set normal text color of $SELECTED_TAB to {0, 63993, 0}"