Цвет фона в текстовой консоли

       ESC ]     OSC      (Should be: Operating  system  command)  ESC  ]  P
                          nrrggbb:  set  palette,  with parameter given in 7
                          hexadecimal digits after the final P :-(.  Here  n
                          is  the  color  (0-15),  and  rrggbb indicates the
                          red/green/blue values (0-255).   ESC  ]  R:  reset
                          palette