iTerm tabs colored by process

function precmd() {
  echo -ne "\033]2;${PWD##*/}\a" # set window title to the current folder
  return
}

function preexec() {
  if [ "$1" = "rs" ]; then
    echo -ne "\033]6;1;bg;red;brightness;180\a"
    echo -ne "\033]6;1;bg;green;brightness;205\a"
    echo -ne "\033]6;1;bg;blue;brightness;90\a"
  elif [ "$1" = "rails c" ]; then
    echo -ne "\033]6;1;bg;red;brightness;137\a"
    echo -ne "\033]6;1;bg;green;brightness;190\a"
    echo -ne "\033]6;1;bg;blue;brightness;244\a"
  elif [[ "$1" = "heroku run"* ]] || [[ "$1" = "heroku logs"* ]]; then
    echo -ne "\033]6;1;bg;red;brightness;200\a"
    echo -ne "\033]6;1;bg;green;brightness;150\a"
    echo -ne "\033]6;1;bg;blue;brightness;225\a"
  fi

  echo -ne "\033]1;$1\a" # set tab title to current command name
  
  return
}

preexec_install