What does what even mean? ZQ? In normal mode it closes any files you’re currently editing (buffer) and closes vim, but discards any unsaved changes.
You might want to frantically press Esc a few times beforehand, to exit any other mode you got yourself into while trying to exit vim.
Joke’s on you, first thing I do is closing the blinders in my office, when I come in to work.
But really, I just prefer dark themes. I can and will totally work with bright themes, if the GUI supports it, but if I have the choice, I chose dark themes wherever possible (e. g. Not for applications in bright sunlight). And yes, I work during daylight hours…