def load_theme_from_json(json_theme):
return load_theme_from_dict(json.loads(json_theme))<EOL>
Load a theme from a json.
Expected format:
{
    "Question": {
        "mark_color": "yellow",
        "brackets_color": "normal",
        ...
    },
    "List": {
        "selection_color": "bold_blue",
        "selection_cursor": "->"
    }
}

Color values should be string representing valid blessings.Terminal colors.