Where to find font and color settings on your iPhone

You can change the font size and text color on your iPhone in two main places: the system-wide accessibility settings, which affect text across most apps, and individual app settings, which let you customize how text looks in specific apps like Mail, Messages, or Notes.

The quickest route to system-wide changes is Settings > Accessibility > Display & Text Size. This is where you'll find options to enlarge text, adjust contrast, and enable bold or larger fonts. Individual apps often have their own text and color controls buried in their settings menus, so the path varies depending on which app you're using.

Key Takeaways

  • System-wide font size changes happen in Settings > Accessibility > Display & Text Size, and these changes affect text in Mail, Messages, Notes, and most other built-in apps.
  • Text color and background color options are usually found in individual app settings rather than in a single iPhone control panel.
  • Dark Mode, available in Settings > Display & Brightness, changes text and background colors across your entire phone at once.
  • Some apps like Notes and Mail let you highlight text and change its color directly within the app, without opening settings.
  • Accessibility features like Increase Contrast and Smart Invert can darken text or reverse colors system-wide if you need higher contrast.

Changing font size across your entire iPhone

Open Settings, then tap Accessibility. Scroll down and select Display & Text Size. You'll see a slider labeled Larger Accessibility Sizes at the bottom of the screen. Drag it to the right to make text larger, or to the left to make it smaller. The preview text above the slider updates as you move it, so you can see the change in real time.

This setting affects text in Mail, Messages, Notes, Calendar, Reminders, and most other Apple apps. It does not affect text inside web pages or text within photos. If you want text to be bold as well as larger, stay in the same menu and toggle on Bold Text. Your phone will restart after you enable this, which takes about a minute.

Using Dark Mode to change text and background colors

Dark Mode inverts your entire screen so that backgrounds are dark and text is light. Go to Settings > Display & Brightness and select Dark. You can also set it to switch automatically at sunset by choosing Automatic and then tapping Options to pick a schedule.

Dark Mode affects almost every app on your phone, including Mail, Messages, Safari, and the home screen. Some apps have their own Dark Mode toggle in their individual settings, so if an app doesn't switch to dark when you enable Dark Mode system-wide, check that app's settings menu. Dark Mode does not change the actual color of text — it only changes the background, so if you need to change text from black to a different color entirely, you'll need to use a different method.

Changing text color in Mail and Messages

In the Mail app, open a new message and start typing. Highlight the text you want to color by tapping and dragging across it, then tap the arrow icon that appears. Select Text Color and choose from the color palette. The color you pick applies only to that message.

In Messages, you cannot change individual text colors within a conversation, but you can use text effects like invisible ink or loud sound. Tap and hold the send button after typing your message, then select Screen or Bubble effects. These add animations to your message but do not change the text color itself. If you need colored text in Messages, you'll need to send it from Mail or another app instead.

Changing text color in Notes and other apps

Open the Notes app and create or open a note. Highlight the text you want to color by tapping and dragging across it. Tap the formatting button (three lines with dots), then tap Text Color and choose a color from the palette. You can also make text bold, italic, or underlined from the same menu.

Other apps like Reminders, Calendar, and third-party apps like Word or Google Docs have their own text formatting options. Look for a formatting button (usually three horizontal lines, an "A", or a paintbrush icon) after you highlight text. If you don't see a formatting option, the app may not support text color changes.

Using Increase Contrast to make text darker and sharper

If you need text to stand out more but don't want to switch to Dark Mode, go to Settings > Accessibility > Display & Text Size and toggle on Increase Contrast. This darkens text and adds stronger borders around buttons and interface elements, making everything sharper and easier to read.

You can also enable Reduce Transparency in the same menu to remove the frosted-glass effect from some screens, which can make text appear crisper. These settings work together with Dark Mode, so you can use both at the same time if you need maximum contrast.

Using Smart Invert to reverse colors system-wide

Smart Invert flips the colors on your screen so that dark backgrounds become light and light text becomes dark. This is different from Dark Mode because it inverts every color, not just the background. Go to Settings > Accessibility > Display & Text Size and toggle on Smart Invert.

Smart Invert can make text harder to read in some apps, especially those with images or custom colors, because it inverts those too. If Smart Invert makes certain apps look wrong, turn it off and use Dark Mode instead, or adjust text size and contrast separately. You can toggle Smart Invert on and off quickly from Control Center by adding it as a shortcut.

Frequently Asked Questions

Can I change the font style, not just the size?

iOS does not let you change the system font family across your entire phone. You can only change the size and weight (bold). Individual apps like Notes, Mail, and Word may offer different font styles within that app, but the system-wide font remains San Francisco.

Why doesn't Dark Mode work in some apps?

Some older apps or third-party apps do not support Dark Mode. If an app doesn't switch to dark when you enable Dark Mode, check that app's own settings menu — it may have its own Dark Mode toggle. If it still doesn't work, the app may need an update from the App Store.

Can I change the color of text in Safari?

You cannot change text color within Safari itself, but you can use Dark Mode to invert the page colors, or use Reader Mode to simplify the page layout. Some websites let you change text size and color through their own settings, which you'll find in the website's menu or preferences.

Will changing font size affect how much text fits on my screen?

Yes. Larger text takes up more space, so fewer words will fit on each line and you'll need to scroll more. If you increase text size significantly, some apps may rearrange their layout to fit the larger text.

How do I undo text color changes I made in Mail?

Highlight the colored text again, tap the arrow icon, select Text Color, and choose black or the default color. If you haven't sent the message yet, you can also undo by swiping left with three fingers or tapping Edit > Undo.