How to use the vcsi.vcsi.Config.background_color function in vcsi

"--timestamp-font",
        help="TTF font used for timestamps",
        dest="timestamp_font",
        default=Config.timestamp_font)
    parser.add_argument(
        "--metadata-position",
        help="Position of the metadata header. Must be one of ['top', 'bottom', 'hidden']",
        dest="metadata_position",
        type=metadata_position_type,
        default=Config.metadata_position)
    parser.add_argument(
        "--background-color",
        help="Color of the background in hexadecimal, for example AABBCC",
        dest="background_color",
        type=hex_color_type,
        default=hex_color_type(Config.background_color))
    parser.add_argument(
        "--metadata-font-color",
        help="Color of the metadata font in hexadecimal, for example AABBCC",
        dest="metadata_font_color",
        type=hex_color_type,
        default=hex_color_type(Config.metadata_font_color))
    parser.add_argument(
        "--timestamp-font-color",
        help="Color of the timestamp font in hexadecimal, for example AABBCC",
        dest="timestamp_font_color",
        type=hex_color_type,
        default=hex_color_type(Config.timestamp_font_color))
    parser.add_argument(
        "--timestamp-background-color",
        help="Color of the timestamp background rectangle in hexadecimal, for example AABBCC",
        dest="timestamp_background_color",