Main Controller view's background color is black but toggling drawer shows white border

My main controller view's background color is black but when I toggle the right drawer,
it shows a white background. Can we change that to black as well so the main controller won't be obvious to be squared out?


Reproduce the issue in the main controller by toggling the right drawer and inspect the drawer transition and background-color handling. Done means the area revealed around the black main controller remains black rather than showing a white border or background.

Written by the indexing model from the issue text.