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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def next_color(self):
 """ Returns the next color. Currently returns a random color from the Colorbrewer 11-class diverging BrBG palette. Returns ------- next_rgb_color: tuple of ImageColor """

        next_rgb_color = ImageColor.getrgb(random.choice(BrBG_11.hex_colors))
        return next_rgb_color