It is now possible to add colors to custom log levels on cli log.

By using :func:`add_color_level <_pytest.logging.add_color_level` from a ``pytest_configure`` hook, colors can be added::

    logging_plugin = config.pluginmanager.get_plugin('logging-plugin')
    logging_plugin.log_cli_handler.formatter.add_color_level(logging.INFO, 'cyan')
    logging_plugin.log_cli_handler.formatter.add_color_level(logging.SPAM, 'blue')

    See :ref:`log_colors` for more information.