Low contrast in focused item background

When opening a list of items (recent files, search files, etc) and moving between items using up/down keys, the focused item’s background has low contrast compared to other items, so it is difficult to distinguish between them. In the image, the background of the schema.rb item is hard to notice.

I think we can use the default island dark theme as an example. The background of the focused item has a good contrast compared to other items, so it is very easy to notice: