[anotheryou]

If you are on windows you can use this awesome tool to have it globally: https://zerowidthjoiner.net/negativescreen

nice plus: inverted mode with correct colors (only brightness inverted)

You could even write your own translation matrix. It's a bit tricky at first, but fun. e.g. true black and white without greys.

For your own matrix this might help (but definitely another format :/ ):

https://kazzkiq.github.io/svg-color-filter/

http://alistapart.com/article/finessing-fecolormatrix

[y04nn]

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

[killjoywashere]

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...

[geoffpado]

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.

[Fnoord]

> (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

[killjoywashere]

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

But have an upvote for the suggestion!

[ntauthority]

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

[ergomarky]

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.