Twitter Dark Mode: How to Turn It On (Web, iPhone, Android)

To turn on Twitter (X) dark mode on the web, click More in the side menu, then Display, and choose Lights out under Background. In the iPhone or Android app, open Settings and privacy, go to Accessibility, display, and languages, then Display, and turn on Dark mode. You can also let X follow your phone’s theme, so it goes dark automatically when your phone does.

The options aren’t the same everywhere anymore. X removed the blue-grey Dim theme from the web in February 2026 and changed the iPhone app’s settings twice in March 2026. This guide covers the current steps for each platform, how syncing with your device works, and what to do when dark mode keeps switching back or an option is missing.

Twitter dark mode options at a glance

Platform	Where to find it	Themes you may see	Follow device theme
Web (x.com)	More, then Display	Default, Lights out	Not documented
iPhone and iPad	Settings and privacy, Accessibility, display, and languages, Display	Light, dark; Dim reported removed in 2026	Yes, depending on app version
Android	Settings and privacy, Accessibility, display and languages, Display	Light, Dim, Lights out (as of March 2026)	Yes, Use device settings

Menu names move around between app versions, so if a label in this guide doesn’t match your screen exactly, look for Display or Dark mode in the same area.

How to turn on dark mode on the web

According to X’s help center, you choose the background theme from the Display settings on x.com:

1. Click More in the side menu.
2. Click Display. If you don’t see it there, open Settings and privacy, then Accessibility, display, and languages, then Display.
3. Under Background, click Lights out.

The same screen lets you change the font size and the accent color. To go back to a white background, choose Default.

Where’s Dim? On February 12, 2026, X removed Dim from the web version, leaving only Default and Lights out. Asked about it, X’s head of product Nikita Bier said the company didn’t “have the capacity to support more than two colors right now”, and added that the team was looking into lightening the black on the web. X’s help center pages still mention Dim in places, which is a common lag: help pages often trail behind the product.

Your web display setting is separate from your app settings, so changing it on x.com doesn’t necessarily change the app on your phone.

How to turn on dark mode on iPhone and iPad

X’s help center describes these steps for the iOS app:

1. Tap your profile photo to open the menu, then tap Settings and privacy.
2. Tap Accessibility, display, and languages.
3. Tap Display (in some versions, Display and sound).
4. Turn on Dark mode, and choose a dark theme if the app offers more than one.

The help center also describes a shortcut: open the profile menu and tap the light bulb icon to reach the dark mode settings. On an iPad with a keyboard, X’s help center lists Cmd + M as the shortcut to switch dark mode on and off.

What changed in 2026. In early March 2026, an iOS update removed the in-app dark mode switch and made the app follow the iPhone’s system appearance only. Bier said the setting was now controlled at the operating system level. After a wave of complaints, X put the switch back in an update around March 12, 2026. Reports at the time said the Dim theme didn’t return on iOS. If your app version only follows the system, use the next method.

If the app only follows your iPhone’s theme

1. Open the iPhone Settings app.
2. Tap Display & Brightness.
3. Under Appearance, choose Dark.

This makes every app that supports dark mode go dark, not just X. Turn on Automatic on the same screen if you want your iPhone to switch at sunset.

How to turn on dark mode on Android

According to X’s help center:

1. Tap your profile icon in the top menu.
2. Tap Settings and privacy.
3. Tap Accessibility, display and languages.
4. Tap Display, then Dark mode.
5. Turn dark mode on, or turn on Use device settings to follow your phone’s theme.
6. Under Dark theme, choose Dim or Lights out.

There’s also a shortcut: open the profile menu and tap the light bulb icon in the bottom-left corner, as X’s help center describes. As of the March 2026 reports, Dim was still available in the Android app, but given the changes on the web and iOS, don’t be surprised if it disappears in a future update.

How to sync X with your device’s dark mode

If you want X to go dark at night and light during the day without touching it, let it follow your phone:

1. In X, turn on Use device settings (Android) or the equivalent system option in your iOS app version.
2. On your phone, set the system theme to switch automatically:
   • iPhone: Settings, then Display & Brightness, then turn on Automatic under Appearance.
   • Android: Settings, then Display, then Dark theme (Pixel) or Dark mode (Samsung). Most phones let you schedule it from sunset to sunrise or at custom times. The exact names vary by manufacturer.

On a computer, use the Display settings described above. X doesn’t document an automatic or scheduled option for the web, so pick the theme you want and change it by hand when you need to.

Dim vs Lights out: what’s the difference?

Theme	Background	Best for
Default	White	Bright rooms, daytime reading
Dim	Dark blue-grey	People who find pure black too harsh
Lights out	Pure black	Night use, maximum contrast, OLED phones

On phones with OLED screens, black pixels are switched off, so Lights out can use a little less battery than Dim or Default. Some people find white text on pure black harder to read, and users who said they have astigmatism were among the loudest critics when Dim was removed. If Lights out bothers your eyes, a larger font size in the same Display screen often helps more than switching back to light mode.

Why the options differ by platform

X’s web app, iOS app and Android app are separate products that get updated on their own schedules, so features change on one before the others. Dark mode in 2026 is a clear example:

Date	Change
February 12, 2026	Dim removed from x.com; Default and Lights out remain
Early March 2026	iOS app drops its in-app dark mode switch and follows the iPhone’s setting
Around March 12, 2026	X restores the iOS switch after user feedback; Dim reportedly not restored on iOS

X’s help center pages haven’t fully caught up, so the instructions there can mention options your app no longer has. When in doubt, trust what your own Display screen shows.

Dark mode keeps switching back or won’t stick: fixes

X turns light during the day. That’s almost always the device sync. If Use device settings is on and your phone switches to light mode on a schedule, X follows it. Turn the sync off and choose dark mode manually, or turn off your phone’s automatic schedule.

The web resets to white. Set it again in More, then Display. If it keeps happening, check whether you’re in a private window or recently cleared your browser data, which may reset site preferences. Browser extensions that restyle websites can also override X’s theme, so try disabling them.

Dim is missing. On the web and, by most reports, on iOS, Dim is no longer offered. Some third-party browser extensions claim to restore it on x.com. They aren’t made by X, so check what permissions an extension asks for before installing it, and never give one your X password.

There’s no dark mode switch at all. Update the app from the App Store or Google Play first. If your version follows the system only, set dark mode on the phone itself, as described above.

The setting changed after an update. App updates sometimes reset display preferences. Go back to Display and set it again.

Everything else is acting up too. If X is glitchy beyond the theme, our guide on why X isn’t working walks through cache, updates and other fixes.

Does dark mode affect your posts?

Dark mode only changes how X looks on your screen. It doesn’t change your posts, your profile or what anyone else sees. Followers see your posts in whatever theme they picked.

That matters for images. A logo or chart with dark text on a transparent background looks fine in Default but can vanish in Lights out. Give graphics a solid background before you post them. Our cheat sheet of X image sizes covers the other things to check before uploading, and how to mute words on X covers another way to make your timeline easier on the eyes.

Key takeaways

• Web: More, then Display, then choose Lights out under Background.
• iPhone and Android: Settings and privacy, Accessibility, display, and languages, Display, then Dark mode.
• X removed Dim from the web on February 12, 2026; reports say iOS lost it in March 2026, while Android still had it then.
• Use device settings makes X follow your phone’s theme, which is the usual reason it keeps switching back.
• X’s help center still describes some older options, so trust what your own Display screen shows.
• Dark mode only affects your view; give transparent images a solid background so they work for everyone.