def is_hsl(in_col):
    """
	Check whether an input is a valid HSL color.
	Return True if it is, otherwise False.
	"""
    if len(in_col) == 3 and type(in_col) == tuple:
        if 0 <= in_col[0] <= 1 and 0 <= in_col[1] <= 1 and 0 <= in_col[2] <= 1:
            return True
        else:
            return False
    else:
        return False
