def color_rgbt_to_rgba(rgbt):
    """
    Convert RGBT color to RGBA.

    Convert an RGBT color given as (r, g, b, t) with all values in range [0.255] to the respective color in RGBA. The T is for transparency, an defined as 1 - alpha, where alpha is the RGBA value A.

    Parameters
    ----------
    rgbt: tupel of 4 integers (in range 0..255)
        The color according to RGBT definition, where T is transparency.

    Returns
    -------
    tupel of 4 integers (in range 0..255)
        The color in RGBA notation.

    Examples
    --------
    Convert a color from RGBT to RGBA:

    >>> import brainload.annotations as an
    >>> an.color_rgbt_to_rgba((120, 0, 240, 40))
    (120, 0, 240, 215)
    """
    rgba = (rgbt[0], rgbt[1], rgbt[2], 255 - rgbt[3])
    return rgba