Changing visualizer window background color to black in C++

[hansolowang]

How to change the background of open3d::visualization::Visualizer to black?

This is what I have

open3d::visualization::Visualizer visualizer;
visualizer.CreateVisualizerWindow("Test", 1600, 900);
// Despite setting the background to black the window is still white... 
auto options = visualizer.GetRenderOption();
options.background_color_ = Eigen::Vector3d(0, 0, 0);

visualizer.Run();
visualizer.DestroyVisualizerWindow();

Despite setting background_color_ to white, the window remains white....
Any pointers is appreciated!