Since Android 10, dark mode has been a system-wide setting. Turn it on in Settings, and everything that respects the setting should switch. In practice, “everything” is not “everything.” Here is how to close the gap.
Step 1: Turn on the system dark mode
The main switch:
- Open Settings → Display.
- Tap Dark theme (or Dark mode, depending on your phone).
- Turn it on. Optionally set a schedule so it follows sunrise/sunset.
Most Google apps, Samsung apps, and well-behaved third-party apps will now flip immediately.
Step 2: For the apps that refuse to follow
Some apps have their own theme setting independent of Android’s. If an app is still light after Step 1, look inside its own settings first. The path is almost always Settings → Appearance or Settings → Display → Theme. Every major app has one of these; most default to “Follow system”, but a few default to “Light”.
Apps in this list of “check the internal setting” that get people every time:
- Chrome (Chrome → Settings → Theme → System default).
- Gmail (menu → Settings → General settings → Theme → System default).
- YouTube (profile picture → Settings → General → Appearance → Use device theme).
- WhatsApp (menu → Settings → Chats → Theme → System default).
- Instagram (profile → menu → Settings and privacy → Appearance → Use system default).
Step 3: Force dark on websites in Chrome
Chrome’s dark mode does not touch the pages you visit — only the browser chrome around them. To force sites into dark:
- Chrome → three-dot menu → Settings → Accessibility.
- Toggle on Force dark mode for web contents.
This is a heuristic: Chrome inverts colours, tweaks contrast, and does its best. It works well on 80% of sites and looks broken on the other 20%. On sites where it looks wrong, tap the padlock next to the URL and toggle dark mode off for that site only.
Step 4: For system apps that will not switch
A handful of Android system dialogs — usually the older ones the manufacturer forgot to update — stay light forever. Two under-used options can help:
Enable “Override force-dark” in Developer Options. This lets Android force a dark theme on apps that do not have one of their own. Note it can make some apps look strange.
- Go to Settings → About phone, tap Build number seven times to enable Developer Options.
- Back in Settings → System → Developer options, scroll to Override force-dark and enable it.
Increase text contrast. Settings → Accessibility → Text and display → High contrast text. This makes any dark-mode text sharper and easier to read.
Step 5: For the truly stubborn apps
Two apps famous for ignoring dark mode:
- Some bank and government apps. These are usually forced light for regulatory or design-consistency reasons. Some banks have added dark themes in the last two years — check the app’s own Appearance setting. Others simply do not have one.
- Older third-party apps. If the app has not been updated since 2020, it will not follow the system theme no matter what you do. Consider whether there is a maintained alternative.
Step 6: Wallpaper matters more than you think
A brilliant light wallpaper behind a fully dark UI looks jarring, and drains OLED-phone battery savings dark mode is supposed to give you. If you are switching to dark mode:
- Pair it with a dark, contrast-restrained wallpaper.
- On Pixel and modern Samsung phones, use the “Themed icons” or “Colour palette” setting so app icons pick up your wallpaper’s palette.
- On an OLED phone, a pure-black wallpaper gives you the biggest battery win.
Step 7: Schedule it, do not fight it
The last thing worth doing: set dark mode to follow a schedule. Settings → Display → Dark theme → Schedule → Turns on at sunset, off at sunrise. Your phone matches the light in the room around you, your eyes get less strain in the evening, and you never think about the setting again.