Traceback (most recent call last):
  File "color_custom.py", line 26, in <module>
    c.affect()
  File "/usr/share/inkscape/extensions/inkex.py", line 215, in affect
    self.effect()
  File "/usr/share/inkscape/extensions/coloreffect.py", line 39, in effect
    self.getAttribs(node)
  File "/usr/share/inkscape/extensions/coloreffect.py", line 42, in getAttribs
    self.changeStyle(node)
  File "/usr/share/inkscape/extensions/coloreffect.py", line 80, in changeStyle
    new_val = self.process_prop(val)
  File "/usr/share/inkscape/extensions/coloreffect.py", line 90, in process_prop
    col='#'+self.colmod(c[0],c[1],c[2])
  File "color_custom.py", line 20, in colmod
    r2=self.normalize(eval(self.options.rFunction))
  File "<string>", line 1, in <module>
NameError: name 'rr' is not defined