human
Solve the following python programming problem given the following code:
@ staticmethod 
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, b, 50) 

    
    

    Fix the buggy line: return merged_colors (b, b, 50)
assistant
#Here is Python program to fix the buggy line: return merged_colors (b, b, 50)
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return merged_colors (b, h, 50)