To turn on dark mode in Gmail on iOS, open the Gmail app, tap the menu icon, go to Settings, then Theme, and select Dark. You can also choose System Default so Gmail follows your iPhone’s overall appearance setting automatically.
Step-by-Step: Enabling Dark Mode in Gmail
1. Open the Gmail app on your iPhone or iPad.
2. Tap the menu icon (three horizontal lines) in the top-left corner.
3. Scroll down and tap Settings.
4. Tap Theme near the top of the settings screen.
5. Select Dark, Light, or System Default.
Additionally, System Default is the most convenient option for most users, since it automatically switches Gmail’s appearance whenever your iPhone switches between light and dark mode.
Using System-Wide Dark Mode Instead
If you don’t see a Theme option inside Gmail’s settings, you can still get a dark Gmail interface by enabling dark mode system-wide. Go to Settings, then Display & Brightness, and tap Dark. Consequently, Gmail and most other apps that support dark mode will switch automatically.
Why Dark Mode Might Not Be Showing
Furthermore, if the Theme option is missing, make sure the Gmail app is fully updated through the App Store, since older versions don’t include the dark mode toggle. In contrast, a fresh install almost always includes this setting by default.
Setting Dark Mode to Match Time of Day
Under Settings, then Display & Brightness, you can also enable “Automatic” and set a custom schedule, so your iPhone (and Gmail) switches to dark mode at sunset and back to light mode at sunrise.
Dark Mode and Battery Life on iPhone
On iPhones with OLED displays, which includes most models from iPhone X onward, dark mode can modestly reduce battery drain since black pixels draw less power than white ones. Additionally, this effect is more noticeable with heavy Gmail use throughout the day, such as frequently checking a busy inbox, than with occasional checking.
Dark Mode in Gmail on the Web
If you also use Gmail through a desktop browser, dark mode there depends on your browser or operating system’s theme rather than a setting inside Gmail itself, since Gmail’s web version doesn’t currently offer its own independent dark theme toggle the way the mobile apps do. Therefore, enabling dark mode at the OS level is the more reliable way to darken Gmail on desktop.
Other Google Apps With Similar Dark Mode Settings
Once you’re comfortable enabling dark mode in Gmail, you’ll find nearly identical Theme settings in other Google apps like Google Drive, Google Calendar, and Google Photos, each accessible through their own in-app Settings menu. Therefore, learning this one pattern in Gmail makes it easy to darken the rest of your Google apps in just a few minutes.
Keeping dark mode consistent across your most-used Google apps not only looks more polished but also reduces the jarring brightness shift that happens when switching between a dark app and a bright one at night.
If you manage more than one Google account on the same device, note that the Theme setting in Gmail is typically applied per account, so you may need to repeat these steps after switching to a different inbox.
Frequently Asked Questions
Does dark mode save battery on iPhone?
Yes, on iPhones with OLED screens, dark mode can reduce battery usage slightly since black pixels use less power than white ones.
Can I set a different theme for Gmail than my phone’s system theme?
Yes. Inside Gmail’s Theme settings, choosing Light or Dark directly overrides your phone’s system setting for the Gmail app only.
Why does Gmail look dark but my other apps don’t?
This happens if you set Gmail’s Theme to Dark manually instead of System Default, meaning it stays dark regardless of your phone’s overall appearance setting.
Is dark mode available on the Gmail Android app too?
Yes. Android’s Gmail app has the same Theme option under Settings, allowing you to choose Light, Dark, or System Default there as well.
Looking for more app tips? Browse our App Guides section, check Fix & Support articles, or read our guide on generating a Gmail app password.
