You can remove the background like this:
#typeans {
background-color: transparent;
}
But actually, that’s an issue that should be solved on Anki’s side within reviewer.scss
. The card body has var(--window-bg)
as background color, but #typeans
has var(--frame-bg)
:
The fact that the background-color is only defined for night mode makes me think it is intentional, though.