def ID_colored_tube(color):
    """Look up the inner diameter of Ismatec 3-stop tubing given its color code.

    :param color: Color of the 3-stop tubing
    :type color: string

    :returns: Inner diameter of the 3-stop tubing (mm)
    :rtype: float

    :Examples:

    >>> from aguaclara.research.peristaltic_pump import ID_colored_tube
    >>> from aguaclara.core.units import unit_registry as u
    >>> ID_colored_tube("yellow-blue")
    <Quantity(1.52, 'millimeter')>
    >>> ID_colored_tube("orange-yellow")
    <Quantity(0.51, 'millimeter')>
    >>> ID_colored_tube("purple-white")
    <Quantity(2.79, 'millimeter')>
    """
    tubing_data_path = os.path.join(os.path.dirname(__file__), "data",
        "3_stop_tubing.txt")
    df = pd.read_csv(tubing_data_path, delimiter='\t')
    idx = df["Color"] == color
    return df[idx]['Diameter (mm)'].values[0] * u.mm
Look up the inner diameter of Ismatec 3-stop tubing given its color code.

    :param color: Color of the 3-stop tubing
    :type color: string

    :returns: Inner diameter of the 3-stop tubing (mm)
    :rtype: float

    :Examples:

    >>> from aguaclara.research.peristaltic_pump import ID_colored_tube
    >>> from aguaclara.core.units import unit_registry as u
    >>> ID_colored_tube("yellow-blue")
    <Quantity(1.52, 'millimeter')>
    >>> ID_colored_tube("orange-yellow")
    <Quantity(0.51, 'millimeter')>
    >>> ID_colored_tube("purple-white")
    <Quantity(2.79, 'millimeter')>