Switching the Outlook color theme updates the entire interface, from folder panes to reading areas. If you are wondering how to change outlook color theme, you have come to the right place. This guide walks you through every method, whether you use Outlook on Windows, Mac, or the web version. You will learn to customize colors quickly and make your email experience more personal.
Outlook offers several built-in themes, but many users do not know where to find them. The process is simpler than you think. Let us start with the most common version: Outlook for Microsoft 365 and Outlook 2019/2021 on Windows.
How To Change Outlook Color Theme On Windows Desktop
Microsoft Outlook on Windows gives you a few ways to change the interface color. You can pick from preset themes or create a custom look. Follow these steps to update your theme right now.
Step 1: Open Outlook Options
First, launch Outlook on your computer. Click the File tab in the top-left corner. A new menu will open. Select Options from the list on the left side. This opens the Outlook Options dialog box.
Step 2: Navigate To The General Tab
In the Outlook Options window, you will see several tabs. Click on General. This tab contains personalization settings, including the color theme option.
Step 3: Choose Your Color Theme
Under the “Personalize your copy of Microsoft Office” section, find the Office Theme dropdown menu. Click it to see the available options. You can choose from:
- Colorful
- Dark Gray
- Black
- White
- Use system setting
Select the one you like. The preview will not show immediately, but do not worry. Click OK to apply the change. Your Outlook interface will update right away.
Step 4: Adjust The Accent Color (Optional)
If you want more control, you can also change the accent color. This affects buttons, links, and highlights. In the same General tab, look for the Office Accent Color dropdown. Pick a color from the palette. This works best with the Colorful or White themes.
That is the main way to change the color theme. But there is also a faster method if you are in a hurry.
Quick Method: Use The Account Menu
Click the File tab again. Then click Account (or Office Account). You will see a section called “Office Theme” right there. Select your preferred theme from the dropdown. No need to go through Options. This method is perfect for a quick switch.
One common mistake is that the theme change only applies to Outlook, not other Office apps. But if you use Microsoft 365, the theme syncs across Word, Excel, and PowerPoint. Keep that in mind if you want a consistent look.
How To Change Outlook Color Theme On Mac
Outlook for Mac looks different from the Windows version. The steps are not the same. Here is how to update the theme on macOS.
Open Outlook Preferences
Launch Outlook on your Mac. In the top menu bar, click Outlook (next to the Apple logo). Then select Preferences. A new window will appear with several options.
Select General
In the Preferences window, click the General icon. This opens the general settings for Outlook.
Choose A Theme
Look for the Appearance section. You will see a dropdown menu labeled “Theme” or “Appearance.” Options typically include:
- Light
- Dark
- System (matches your Mac’s setting)
Select your desired theme. The change applies immediately. Unfortunately, Outlook for Mac does not offer as many color options as the Windows version. You cannot change accent colors here. But you can still switch between light and dark modes.
If you want more customization, consider using the web version of Outlook on your Mac browser. It offers more theme choices.
How To Change Outlook Color Theme On The Web
Outlook on the web (outlook.com or Office 365 web app) is popular for its simplicity. Changing the theme here is straightforward. Here is how.
Access Settings
Open your web browser and go to Outlook.com or your work Outlook web app. Log in if needed. Click the gear icon (Settings) in the top-right corner. A pane slides out from the right side.
Open Theme Options
At the bottom of the Settings pane, click View all Outlook settings. A new window opens. On the left side, select General. Then click Appearance.
Pick A Theme
You will see several preset themes. These include light, dark, and colorful options. Some themes have background images. Click on any theme to preview it. The interface updates instantly. If you like it, click Save at the bottom. If not, just pick another one.
You can also create a custom theme. Click the Custom theme option. You can upload your own image or choose a solid color. This gives you full control over the look.
Dark Mode On The Web
The web version has a dedicated dark mode. In the Appearance settings, select “Dark” under Theme. This changes the entire interface to a dark background. It is great for reducing eye strain in low light.
One tip: The web theme does not sync with the desktop app. You need to set it separately on each platform.
How To Change Outlook Color Theme On Mobile
The Outlook mobile app for iOS and Android also supports theme changes. Here is how to do it on your phone.
Open The App Settings
Launch the Outlook app on your device. Tap your profile picture or the hamburger menu (three lines) in the top-left corner. Scroll down and tap the gear icon (Settings).
Select Theme
In the Settings menu, look for Theme or Appearance. Tap it. You will see options like:
- Light
- Dark
- System default
Some versions also let you choose a custom accent color. Tap your choice. The app updates immediately. No need to restart.
Customize Further
On Android, you might have more options. Some builds allow you to pick a background image for the inbox. This is not available on all devices. Check your app version for the latest features.
Mobile theme changes are independent of desktop and web. You have to set them individually.
How To Change Outlook Color Theme Using Registry (Advanced)
If you want even more control, you can tweak the Windows Registry. This method is for advanced users only. It lets you force a specific theme even if the option is grayed out. Proceed with caution.
Backup Your Registry First
Before making any changes, back up your registry. Open the Registry Editor (regedit). Click File > Export. Save a copy of your current settings. This protects you if something goes wrong.
Navigate To The Outlook Key
Go to this path: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common (the version number may vary). Look for a key called Theme or OfficeTheme. If it does not exist, create a new DWORD value.
Set The Value
Double-click the Theme value. Enter a number to choose your theme:
- 0 = Colorful
- 1 = Dark Gray
- 2 = Black
- 3 = White
Click OK and restart Outlook. The theme will change to your chosen one. This method bypasses the normal settings menu. Use it only if the standard options do not work.
Be aware that registry edits can affect other Office apps. Also, Microsoft may override these settings with updates. It is not a permanent solution.
Troubleshooting Common Theme Issues
Sometimes the theme does not change as expected. Here are a few problems and fixes.
Theme Not Applying
If you select a theme but nothing happens, try restarting Outlook. Close the app completely and reopen it. If that does not work, check for updates. Go to File > Office Account > Update Options > Update Now. Install any pending updates and try again.
Theme Options Grayed Out
Grayed out options usually mean your organization has restricted theme changes. This is common in corporate environments. Contact your IT administrator. They may allow theme changes through group policy. If not, you are stuck with the default theme.
Dark Mode Not Working
Dark mode might not work if your Windows settings override it. Check your Windows personalization settings. Go to Settings > Personalization > Colors. Make sure “Choose your default app mode” is set to Dark. Then restart Outlook.
Accent Color Not Showing
If you pick an accent color but it does not appear, switch to the Colorful theme first. Accent colors work best with that theme. The White and Dark themes use limited accent colors.
Frequently Asked Questions
Can I change the Outlook color theme without admin rights?
Yes, on personal devices you can change it freely. On work computers, admin rights may be needed if group policy blocks changes. Try the settings menu first. If it is grayed out, you cannot change it without IT help.
Does changing the Outlook theme affect my emails?
No, the theme only changes the interface. Your emails, fonts, and signatures remain the same. The reading pane and folder list get a new color, but the content stays unchanged.
How do I reset the Outlook color theme to default?
Go back to the theme settings. On Windows, choose “Colorful” or “Use system setting.” On Mac, select “Light” or “System.” On the web, pick the default theme (usually blue). This restores the original look.
Can I use a custom image as the Outlook background?
Only on the web version. In Outlook on the web, you can upload an image as a custom theme. The desktop app does not support custom images for the background. You are limited to preset themes and accent colors.
Why does my Outlook theme keep changing back?
This can happen if you have multiple devices syncing. Check if your theme is set per device. Also, some Microsoft updates reset themes. If it keeps happening, set the theme again after each update. You can also try the registry method for a more permanent fix.
Final Tips For A Personalized Outlook
Changing the color theme is just the beginning. You can also customize the navigation pane, font sizes, and reading pane layout. Experiment with different themes to find what works best for your eyes and workflow. The dark theme is great for late-night work, while the colorful theme adds energy to your day.
Remember that the theme you choose can affect productivity. A cluttered or bright interface might distract you. Stick to a theme that feels comfortable for long sessions. If you work in a team, consider using a consistent theme to avoid confusion when sharing screens.
One last thing: if you use multiple Outlook accounts (personal and work), each account may have its own theme settings on the web. The desktop app uses one theme for all accounts. Keep that in mind when switching between them.
Now you know exactly how to change outlook color theme on every platform. Go ahead and give your inbox a fresh look. It takes less than a minute and makes a big difference in your daily email experience.