`GetBackgroundColour()` and `SetBackgroundColour(wx.Colour)` | The background color of a frame is the color chosen for any part of the frame not covered by a child widget. You can pass a `wx.Colour` ...

I posted this a while back to the MatPlotLib Issues. Reposting here because it was suggested that this was a wxPython issue: matplotlib/matplotlib#17513. import wx import wx.lib.scrolledpanel as ...