In command-line, custom text and background colors by directory

When in command-line, I need to set custom text and background colors by directory. Example:

cd /home/someuser/Documents [ENTER] # I have black text white background
cd /home/someuser/Public [ENTER]  #I have white text on black background

How to achieve this?

One solution is to overwrite cd with a function.

Let us say that I saved the function in a file named cd at the $HOME. Now I can start using it by $ source cd and then $ cd ~/Documents etc.

function cd(){

    builtin cd "$@";

    case "$PWD" in

    "$HOME/Documents")
        echo -ne "\033]10;#000000\007"
        echo -ne "\033]11;#FFFFFF\007"
      ;;
    "$HOME/Public")
        echo -ne "\033]10;#FFFFFF\007"
        echo -ne "\033]11;#000000\007"
      ;;
    *)
        # Any other place
        echo -ne "\033]10;#FFFFFF\007"
        echo -ne "\033]11;#000000\007"
      ;;
    esac
}

Note that you can omit the $HOME/Public part because # Any other place would handle it anyway. I just leave it there as a reference so you can add any other color if you like.