Containers for account toggle switch and list header are rendered poorly in themes other than Ambiance / Radiance

[Dylan McCall]

I am attaching a screenshot of the High Contrast theme and the Adwaita theme rendering the ubuntu-online-accounts Control Center panel. Two elements here are a problem: the container around "Google [On/Off]", and the container around "The following applications integrate with your Google account".
In both cases, the background changes significantly from Ambiance but the foreground colour remains black. In addition, the background colour for the application list's header seems to be selected rather poorly, as it should be white in every case here.