def METHOD_NAME():
    # If a check fails, ValueError is raised, so we need no assert statement
    styles.Style.check_valid_color("#ffffff")  # 6 digit hex
    styles.Style.check_valid_color("#FFFFFF")  # 6 digit hex capital
    styles.Style.check_valid_color("#FFfFfF")  # 6 digit hex mixed case
    styles.Style.check_valid_color("#00fFfF")  # 6 digit hex mixed case and number