Where to find theme and appearance settings on your iPhone

Your iPhone's theme settings live in the Settings app under Display & Brightness. Open Settings, scroll down and tap Display & Brightness, and you'll see your options for Light, Dark, or Auto mode right at the top. This is the main control for how your phone looks — whether the background and text appear light or dark.

The "Auto" option is the default on most iPhones. It switches your phone automatically from Light mode during the day to Dark mode at night, based on sunset and sunrise times in your location. If you want to lock it to one appearance, tap either Light or Dark and your phone will stay that way until you change it again.

Beyond the basic light and dark toggle, you can customize accent colors, icon styles, and lock screen appearance through different settings. These changes are scattered across Settings rather than grouped in one place, so knowing where each one lives saves time.

Key Takeaways

  • Light, Dark, and Auto modes are controlled in Settings > Display & Brightness at the very top of the menu.
  • Dark mode reduces eye strain in low light and saves battery on iPhones with OLED screens, while Light mode is easier to read in bright sunlight.
  • You can customize your lock screen appearance, including fonts and widget colors, by long-pressing the lock screen and tapping "Customize."
  • Accent colors for buttons and highlights are changed in Settings > Accessibility > Display & Text Size > Button Shapes or Color Filters, depending on what you want to adjust.
  • Some apps have their own theme settings inside the app itself, separate from your system-wide iPhone theme.

Switching between Light and Dark mode

To change from one mode to the other, go to Settings > Display & Brightness. You'll see three buttons: Light, Dark, and Auto. Tap whichever one you prefer. Light mode shows a white background with dark text. Dark mode shows a dark background with light text. The change takes effect when ready across your home screen, settings, and most built-in apps.

If you choose Auto, your phone will switch at sunset and sunrise based on your location. You can also set a custom schedule: tap Auto, then scroll down to "Options" and choose "Schedule." From there you can pick a specific time to switch, or stick with Sunset to Sunrise. This is useful if you work night shifts or prefer a consistent look regardless of the time of day.

Some apps don't follow your system theme and stay light or dark no matter what you choose. This is because the app developer built their own theme system. You may be able to change the theme inside that app's own settings, but the system-wide toggle won't affect it.

Customizing your lock screen appearance

Your lock screen can look very different from your home screen, and you control that separately. Long-press your lock screen (the one you see when you first wake your phone) and tap "Customize" at the bottom. You'll see options to change the wallpaper, the font style for the time and date, and the color of those elements.

Tap "Wallpaper" to choose a new background image or color. You can pick from Apple's built-in collections, your photo library, or create a solid color. Once you pick a wallpaper, the lock screen will suggest accent colors that match it — you can accept one of these or choose your own.

The font and color of your time and date display can be changed by tapping the time itself while in customization mode. You'll see different font styles and color options. Some fonts are thicker or thinner, and some colors will be easier to read depending on your wallpaper. Test a few to see what looks clear to you.

Changing accent colors and button styles

If you want to change the color of buttons, switches, and highlights throughout your phone, go to Settings > Accessibility > Display & Text Size. Scroll down to "Color Filters" and toggle it on. This lets you explore a tint to your entire screen, which shifts all the accent colors at once.

Alternatively, go to Settings > Accessibility > Display & Text Size and look for "Button Shapes." Turning this on adds outlines and background fills to buttons, making them stand out more. This doesn't change the color itself, but it makes interactive elements easier to spot.

These accessibility settings affect your whole phone, not just one app. If you want to change colors in a specific app only, open that app and look in its own settings menu — most apps have a Preferences, Settings, or Theme option somewhere in their menu.

Adjusting text size and contrast

If the text on your screen is too small or hard to read, you can make it larger without changing your theme. Go to Settings > Display & Brightness and tap "Text Size." Drag the slider to make text bigger or smaller. This affects text in Mail, Messages, Notes, and other built-in apps, but not all third-party apps.

For even more control, go to Settings > Accessibility > Display & Text Size. Here you'll find "Larger Accessibility Sizes," which makes text even bigger if you need it. You can also turn on "Bold Text" to make all text thicker and easier to read, or "Increase Contrast" to make text stand out more against backgrounds.

The "Reduce Transparency" option in the same menu removes the blurred glass effect from some menus and makes backgrounds more solid. This can help if you find the transparency effect distracting or hard to read through.

Using focus modes to change your phone's appearance by time or activity

Focus modes let you create different phone looks and behaviors for different times of day or activities. Go to Settings > Focus and tap the plus sign to create a new focus. You can name it (Work, Sleep, Gym, Driving, and several others are pre-built), then customize which apps and contacts can reach you.

Once you've set up a focus, you can assign it a custom lock screen. When that focus turns on, your phone will switch to that lock screen automatically. This means you could have a minimal lock screen for Work mode and a colorful one for personal time, and they'll switch without you doing anything.

To assign a lock screen to a focus, go to Settings > Focus, tap the focus you want to customize, and scroll down to "Lock Screen." Tap it and choose which lock screen you've already created, or create a new one right there. You can set the focus to turn on at a specific time, when you arrive at a location, or manually whenever you want.

Checking if individual apps have their own theme settings

Many apps, especially social media and messaging apps, have their own theme controls separate from your iPhone's system settings. Open the app and look for Settings, Preferences, or a gear icon. Then search for Theme, Appearance, or Display options.

For example, Instagram has its own Dark mode toggle in Settings > Theme. Twitter has appearance options in Settings & Privacy > Display & Sound. Gmail lets you choose Light, Dark, or System Default in its settings. These app-level themes override your system theme for that app only.

If an app doesn't have a theme option, it will follow your iPhone's Light or Dark mode setting automatically. If it has its own theme setting, that takes priority. Check the app first before assuming your system theme controls everything.

Frequently Asked Questions

Does Dark mode really save battery on my iPhone?

Dark mode saves battery on iPhones with OLED screens (iPhone 12 and newer), because black pixels use less power than white ones on that type of display. On older iPhones with LCD screens, the difference is minimal or nonexistent. If you have an iPhone 12 or newer and use Dark mode regularly, you may see a small improvement in battery life.

Can I set different themes for different times of day automatically?

Yes, use Focus modes. Create a focus for each time of day or activity, assign a custom lock screen to each one, and set it to turn on automatically at specific times. Your lock screen will switch when the focus activates, though your system Light or Dark mode won't change unless you set that up separately in Display & Brightness > Auto.

Why does one of my apps not follow my Dark mode setting?

That app has its own theme system built in. Open the app and look in its settings for Theme, Appearance, or Display options. You can usually change it there. If the app doesn't have a theme setting, contact the app developer — they may not have added Dark mode support yet.

Can I use a custom color as my lock screen background?

Yes. Long-press your lock screen, tap Customize, then tap Wallpaper. Scroll to "Colors" and choose a solid color. You can then customize the font and time color to match. This creates a clean, minimal lock screen with no image.

What's the difference between changing my wallpaper and changing my theme?

Your theme (Light or Dark mode) controls whether text and buttons are light or dark across your whole phone. Your wallpaper is just the background image on your home screen and lock screen. You can change your wallpaper without changing your theme, or vice versa.