diff --git a/source/lib/cornerToolController.py b/source/lib/cornerToolController.py
index 08409f5..c2016b2 100644
--- a/source/lib/cornerToolController.py
+++ b/source/lib/cornerToolController.py
@@ -36,7 +36,6 @@ class CornerController:
     def __init__(self):
         self.modifiedGlyph = None
         self.w = FloatingWindow((400, 170), 'Corner Tool')
-        self.w.getNSWindow().setBackgroundColor_(NSColor.whiteColor())
         self.modes = ['Break', 'Build', 'Pit']
         self.objectTypes = {'Break':'Corner point', 'Build':'Segment', 'Pit':'Corner point'}
         self.parameters = {