Similar to this issue here but not related to the wallpaper: https://bbs.deepin.org/en/post/290850
On windows that have darker/black backgrounds, clicking on menus and having their popped up context, should display a lighter background colour of the menu to ameliorate the visibility issue.
Example on VLC:
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Visibility issue on menus when popped up on windows having dark screen 
Similar to this issue here but not related to the wallpaper: https://bbs.deepin.org/en/post/290850
On windows that have darker/black backgrounds, clicking on menus and having their popped up context, should display a lighter background colour of the menu to ameliorate the visibility issue.
Example on VLC: