<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_bottom_line_color(self):
 """Returns color rgb tuple of bottom line"""


        color = self.cell_attributes[self.key]["bordercolor_bottom"]
        return tuple(c / 255.0 for c in color_pack2rgb(color))