Outlook Mobile Calendar Color Code Per Calendar Source: How to Apply

When you use Outlook on your iPhone or Android phone, you may see multiple calendars from different sources such as your work Exchange account, your personal Google account, and a shared team calendar. By default, Outlook assigns a random color to each calendar, making it hard to tell at a glance which events belong to which account. The Outlook mobile app lets you change the color for each calendar source individually so you can visually separate work events from personal ones. This article explains how to apply a custom color to each calendar source in Outlook for iOS and Android.

How Calendar Color Coding Works in Outlook Mobile

Outlook Mobile displays a colored dot next to each event in the day or week view. This dot matches the color assigned to the calendar source that owns the event. The app does not let you assign colors to individual events. Instead, you set one color per calendar source. For example, all events from your Work Exchange account share one color, and all events from your Personal iCloud account share another color.

The color you choose appears in three places: the small dot on the calendar grid, the event bar in the agenda list, and the calendar name in the Settings screen. Outlook Mobile supports about 20 preset colors. You cannot create a custom hex color code. The color applies to all events in that calendar source, including past, present, and future events.

Steps to Change the Calendar Color for Each Source

The following steps work on Outlook for iOS version 4.2410 and later and Outlook for Android version 4.2410 and later. The menu names are identical on both platforms.

1. Open Outlook and tap your profile icon
   Tap the circle icon with your initials or photo in the top-left corner of the Mail or Calendar view. This opens the Settings menu.
2. Tap the gear icon
   In the Settings menu, tap the gear icon in the top-right corner to open the full Settings screen.
3. Scroll to the Calendars section
   On the Settings screen, scroll down until you see the Calendars heading. Below this heading, a list shows every calendar source you have added to Outlook. Each source has a colored circle next to its name.
4. Tap the calendar source you want to recolor
   Tap the name of the calendar source, for example “Work” or “Personal.” Do not tap the toggle switch. A new screen opens showing details for that calendar source.
5. Tap Calendar color
   On the calendar source detail screen, tap the row labeled Calendar color. A palette of colored circles appears.
6. Tap a new color
   Tap any circle to select that color. The app immediately applies the new color to all events from that calendar source. Tap the back arrow to return to the Settings screen.
7. Repeat for each calendar source
   Repeat steps 4 through 6 for every calendar source you want to recolor. You can assign the same color to multiple sources, but that defeats the purpose of visual separation.

If the Calendar Color Option Is Missing

Some calendar sources do not support color changes in Outlook Mobile. For example, calendars shared by other people in your organization that appear under “Shared calendars” may not show the Calendar color option. In this case, the color is controlled by the owner of the shared calendar and cannot be changed on your device. You can still toggle the visibility of the shared calendar on or off, but the color remains what the owner set.

Another limitation occurs with calendars that are added via an unsupported protocol such as CalDAV or a third-party sync app. Outlook Mobile only supports Exchange, Outlook.com, Google, iCloud, and Yahoo calendar sources. If you added a calendar through an app like Sync2 or a custom CalDAV server, the color option may not appear.

Common Mistakes and Limitations

I changed the color but events still show the old color

Wait up to 30 seconds for the color to refresh. Outlook Mobile caches calendar data, and the color change may not appear instantly. Pull down on the calendar view to force a refresh. If the color still does not update, close the Outlook app completely and reopen it.

The color I picked does not match the event bar in the agenda

The event bar in the agenda list uses a lighter tint of the selected color. The dot on the calendar grid uses the full color. This is by design and cannot be changed. For example, if you select blue, the dot will be a solid blue and the event bar will be a light blue gradient.

I want a specific color that is not in the palette

Outlook Mobile does not support custom hex colors. You must choose from the 20 preset colors. If you need more color variety, consider switching to a third-party calendar app that supports custom colors, but you will lose Outlook’s email and calendar integration.

Color changes do not sync to Outlook desktop

The calendar colors you set in Outlook Mobile only apply to the mobile app. The desktop version of Outlook (Outlook for Windows or Outlook for Mac) uses its own color system. To change colors on the desktop, you must use the desktop app’s Calendar Properties dialog.

Outlook Mobile Calendar Color Options: Preset Palette vs No Custom Colors

Item	Preset Palette	No Custom Colors
Number of colors	20 preset colors	0 custom colors
Hex code support	Not supported	Not supported
Color per event	Not supported	Not supported
Color per calendar source	Supported	Not applicable
Syncs across mobile devices	Yes	Not applicable
Syncs to desktop Outlook	No	Not applicable

Now you can assign a distinct color to each calendar source in Outlook Mobile. Start by opening Settings and tapping Calendars to see all your sources. Pick a color that makes sense for each account, such as red for work and green for personal. To get the most out of this feature, use the same color order on all your devices so you can recognize events instantly without reading the calendar name.