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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 get_system_bck_color():
 """ Gets a system color for drawing the fold scope background. """

        def merged_colors(colorA, colorB, factor):
            maxFactor = 100
            colorA = QtGui.QColor(colorA)
            colorB = QtGui.QColor(colorB)
            tmp = colorA
            tmp.setRed((tmp.red() * factor) / maxFactor +
                       (colorB.red() * (maxFactor - factor)) / maxFactor)
            tmp.setGreen((tmp.green() * factor) / maxFactor +
                         (colorB.green() * (maxFactor - factor)) / maxFactor)
            tmp.setBlue((tmp.blue() * factor) / maxFactor +
                        (colorB.blue() * (maxFactor - factor)) / maxFactor)
            return tmp

        pal = QtWidgets.QApplication.instance().palette()
        b = pal.window().color()
        h = pal.highlight().color()
        return merged_colors(b, h, 50)