def change_background(color):
    """Setup the background color to *color*. 
    
    Example::

      change_background('black')
      change_background('white')
      change_background('#ffffff')
    
    You can call this function interactively by using::

        change_color.interactive()
    
    A new dialog will popup with a color chooser.


    .. seealso:: :py:func:`chemlab.graphics.colors.parse_color`

    """
    viewer.widget.background_color = colors.any_to_rgb(color)
    viewer.update()