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If you are on macos you can do it globally and natively by going in the accessibility settings.

Check out Nocturne (originally from Blacktree, of QuickSilver fame). It even has a full red monochrome option (in case you need to finish that paper at 2 am but don't want to keep your roommates awake).

I really wish Android and iOS had a full red monochrome night-vision mode.

Short of that, for Android, you can switch to monochrome directly in Developer mode: https://www.trishtech.com/2016/02/how-to-turn-android-lollip...

iOS does have a red monochrome option! Settings > General > Accessibility > Display Accommodations > Color Filters > Color Tint

Not the easiest to find, but it's there for people who need/want it.

> (in case you need to finish that paper at 2 am but don't want to keep your roommates awake).

Like iOS, macOS has native Night Shift mode as well. Or you can use F.lux

Not the same. Nocturne turns white black and black red.

But have an upvote for the suggestion!

Same goes for any recent Windows version (1709 or 1803?) - Settings -> Ease of Access -> Color filters.

Shortcut Win + Ctrl + C. I've known a couple people accidentally press it and think their display is broken! Use it quite often for quick visibility testing.

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