Where to find Twitter dark mode on the web, iPhone and Android

A white feed is harsh in a dark room, and X keeps the switch that fixes it three menus deep, under a slightly different name on each device.

Turn on Twitter dark mode in Settings and privacy under Accessibility, display, and languages, then Display. The web calls the dark option Lights out, the iPhone app calls it Night, and Android shows a Dark mode switch. Lights out and Night are both pure black, because X retired Dim, its dark blue-gray theme, from the web and the iPhone app; only the Android app may still offer it.

Below you'll find the taps for each device, how the two themes differ, what dark mode does for battery life and eyes, and how to make it switch on by itself at night.

How to switch Twitter to dark mode, device by device

X uses the same path on every device with small label changes.

The Android steps come from X's own guide to the Android app. The iPhone steps follow the picker the app has had since March 2026, because X's guide to the iPhone app still describes an older Dark mode slider. The web steps come from the options x.com shows today.

In the X app on iPhone or iPad

1. Tap your profile menu and choose Settings and privacy.
2. Tap Accessibility, display, and languages.
3. Open Display.
4. Tap Night, or System to follow your iPhone's own Light or Dark setting.

In the X app on Android

1. Tap your profile icon in the top menu and select Settings and privacy.
2. Select Accessibility, display and languages, then Display.
3. Select Dark mode to turn it on.
4. Under Dark theme, pick Lights out, or Dim if your app still shows it.

On x.com in a computer's browser

1. Select More in the left sidebar.
2. Choose Settings and privacy, then Accessibility, display, and languages.
3. Open Display and go to the Background options.
4. Select Lights out.

The light bulb shortcut on Android

1. Tap your profile icon.
2. Tap the light bulb icon in the menu's bottom left corner, and use the Dark mode switch that opens.

With a keyboard attached to an iPhone or iPad, X's iOS help lists one more shortcut: Command-M switches dark mode on and off.

Starting from Settings and privacy works on every version because X files its display options there.

Only the name of the dark option changes:

• Lights out on the web.
• Night on iPhone.
• Dark mode on Android.

Does Twitter still have dark mode?

Yes. Twitter dark mode is on every version of X, but the web and the iPhone app are now down to one dark background, pure black.

I checked the settings text x.com loads today: Background lists Use system setting, Light and Lights out, and Dim is not in it at all.

X's accessibility features page still lists "Dark / Dim modes" for the web, iOS and Android. X's app instructions still describe both themes too, but the iPhone app's picker offers only System, Day and Night.

In February 2026, X's head of product told a user mourning Dim that X doesn't "have the capacity to support more than two colors right now."

If dark mode seems to have vanished on your screen, a setting is usually following something else.

For about a week in March 2026 it really was gone from the iPhone app. The app simply followed the phone's own setting, as X's head of product confirmed, until the next update brought the System, Day and Night picker.

With Use system setting selected, x.com matches your device, so when your computer turns light in the morning, X turns light with it. A browser where you never picked a theme starts from the device's setting too.

Dim or Lights out: which X dark theme should you pick?

Pick Lights out (Night on iPhone): on the web and on iPhone it is the only dark theme left.

Dim may survive only in the Android app, where X's instructions still list it. If your Android app shows it, it suits readers who find pure black too stark.

The two Twitter dark mode themes differ by one color. Lights out is pure black, #000000, the value x.com's code uses for its dark theme.

Dim is a dark blue-gray. The site's code still keeps its color value, rgb(21, 32, 43), or #15202B in hex, even though the web no longer offers the theme.

White text on that blue-gray sits at slightly lower contrast than white on black, so Dim looks softer and Lights out looks starker.

On an iPhone, the black theme takes even the app's settings sheets to pure black, as in this content-warning screen from X's help center, where only the preview card stays dark gray.

Does Twitter dark mode save battery?

Yes on phones with OLED screens, but far less than most people expect at everyday brightness.

Purdue University researchers measured the effect in 2021 on four phones, the Pixel 2, Moto Z3, Pixel 4 and Pixel 5, testing six of Google's own apps rather than X.

Their dark mode battery study found that brightness decides most of the result.

At 100% brightness, switching from light mode to dark mode saved an average of 39% to 47% of battery power.

At 30% to 50% brightness, the saving dropped to 3% to 9%.

Why everyday brightness shrinks the saving

The second range is the one most people live in. Purdue's announcement notes that phones on the default auto-brightness setting tend to stay around 30% to 40% most of the time indoors.

The screen explains the gap. Purdue points out that OLED screens have no backlight like the LCD screens of older phones, so they draw less power when showing dark pixels. Lights out, X's pure-black theme, leans on that effect the most.

Follow-up data from the same team shows an upside for people who turn brightness up. If dark mode is easier on your eyes but you need a brighter screen to read it, Purdue says the extra brightness won't take the toll on battery you might fear.

High brightness is where dark mode saves the most.

If battery is your main reason, the black theme on an OLED phone at high brightness, outdoors for example, is where the saving shows. At indoor brightness, pick the theme you find easier to read.

Is X's dark mode easier on your eyes?

For some readers, yes.

Google's developer page on dark theme for Android says a dark theme improves visibility for people with low vision and for those sensitive to bright light. It also makes a device easier to use in low light, the page adds.

That stops short of calling dark mode better for everyone's eyes, and X leaves room for readers it doesn't suit.

On the web, Increase color contrast sits under Settings and privacy, then Accessibility, display, and languages, then Accessibility. X says it "improves legibility by increasing the contrast between text and background colors," and its accessibility page lists a high contrast mode for the iPhone app too.

The same web page has Reduce motion, which "limits the amount of in-app animations, including live engagement counts," for readers who find a moving feed tiring in any theme.

Timing matters as much as the theme.

Microsoft's page on personalizing colors in Windows describes dark mode as designed to work well in a low-lit environment. Light mode, it says, is designed for daylight hours, which is a good rule for X as well.

Text size helps in either theme. Font size sits on the same Display page as the theme, on the web and in the iPhone app.

Make Twitter dark mode turn on by itself at night

Hand the choice to your device: select Use system setting on x.com, System in the iPhone app or Use device settings in the Android app, then schedule dark mode in the device's own settings.

On x.com, once Use system setting is selected, your theme "will automatically switch based on your device settings," as the Display page puts it. A browser with no saved choice behaves the same way, because the site's first script reads the device's light or dark setting when nothing else is stored.

On Android, X's help offers Use device settings for anyone who has "already scheduled your phone to turn on dark mode automatically," so the app follows the phone's own switch.

Google's help on Android's dark theme puts that switch under Settings, then Display.

It also notes that battery saver may turn dark theme on, which X follows while Use device settings is on.

Google's developer documentation adds a Quick Settings tile for switching themes from the notification tray, where the phone has it enabled. While Use device settings is on, that tile switches X as well.

Scheduling on iPhone, Mac and Windows

On an iPhone, Apple's steps to use Dark Mode include an Automatic option under Settings, then Appearance (Display & Brightness in iOS 26 and earlier), with Options for the schedule.

With the X app set to System, X follows that schedule, and so does x.com in the browser on Use system setting.

Apple also puts a manual toggle in Control Center: touch and hold the brightness bar, then select Dark Mode. With X on System, that one gesture flips the app too.

On a Mac, Apple's Auto appearance follows your Night Shift schedule, so x.com set to Use system setting turns dark on that schedule too.

Windows users pick the mode under Settings, Personalization, Colors, then Choose your mode.

Choosing your Twitter dark mode setting

Which Twitter dark mode setting fits depends on where you read X and why you want it dark:

• If you use x.com on a computer, choose Lights out, the only dark background the web has left.
• If you read on an OLED phone at high brightness, choose the black theme, Night on iPhone, for the biggest battery saving.
• If pure black feels harsh, look for Dim in the Android app, the only app where it may still appear, or switch to the light theme by day.
• If you want dark mode only at night, choose the system or device option and schedule it on the device.
• If text gets harder to read in the dark, turn on Increase color contrast on the web or high contrast mode on iPhone.

Whichever branch fits, the switch sits in the same Display section, so changing your mind later takes a few taps.

Screenshots, accent colors and other browsers: X dark mode questions

How do I switch X back to light mode?

Reverse the last step. Choose Light under Background on x.com, Day in the iPhone app, or select the Dark mode option again on Android.

If you had picked a system option, switch it to a fixed choice, or X will keep following your device.

Why do my screenshots of posts come out black?

A screenshot captures the theme you're viewing, and Lights out is pure black.

Before you capture, pick Light under Background on x.com, Day on iPhone or turn Dark mode off on Android, and change it back once you have the image.

Does the accent color setting change the background?

No. Color, on the same Display page, sets X's accent from six options, Blue, Yellow, Pink, Purple, Orange and Green, while the background has its own row.

Why did x.com open in light mode in another browser?

The choice lives in the browser where you made it. X's Display page says its settings "affect all the X accounts on this browser," and when a browser has no saved choice, as in a private window, x.com follows the device's light or dark setting.