Thank you @.jsn that worked! I also noticed that the background color of the toolbar is slightly different than a tabview preferences window, when the window is selected. It is slightly whiter in light mode and slightly blacker in dark mode. For example #363636 vs #1E1E1E in dark mode. Is there anything else I need to do to get the toolbar color to match a tabview preferences window, or is this just a minor design oversight that I should ignore?