Advice
September 19, 2025

How to Change the Color & Appearance of Outlook?

By
Letsignit

Whether you want to create an email space that suits your taste, cultivate a consistent brand image, or make your messages more attractive, changing the appearance of your Outlook inbox is a simple but useful task!

Find out how to change the colors in Outlook, from the background to the calendar to the font of your emails.

Why Change the Appearance of Your Emails?

Why change email appearance

For the same reasons you fell in love with that neon green top (yes, it's very pretty, we promise!). Well, not only that.

Changing the appearance of your email client and emails is obviously a matter of personal taste. Customization options allow you to design an email space that you like and improves your visual comfort, for example when creating your Outlook mailbox.

But changing the style and colors of your emails also improves readability and accessibility for your recipients. The more readable and visually appealing your emails are, the more likely your message is to be understood and even remembered!

What's more, by adapting the look of your emails to your graphic charter, you can ensure that your communication is aligned with your brand image and has a greater impact.

Tips for Choosing the Right Look for Your Emails

Here are our three best tips for customizing your emails wisely!

01Prioritize Readability

Especially in your professional correspondence, make sure your emails are readable and accessible.

To do this, first prioritize contrast by choosing a light font color on a dark background, or vice versa. Also, check that any background patterns do not interfere with readability.

The style of your font is also important: if you opt for a slightly unusual typeface, make sure it remains readable!

02Think About Your Brand Image

Don't forget: the visual aspect of your messages has a real impact on your communication. If your emails sometimes feature orange font on a polka dot background and sometimes purple font on a striped background, this gives the impression of an uncertain visual identity (and therefore brand)!

So choose a design and colors that are in line with your graphic charter and brand image. Your communication will be more consistent and memorable, and will therefore have more impact on your audience.

And to really boost your communication, don't forget to create your own Outlook email signature!

03Customize According to the Type of Message

When customizing your emails, make sure you adapt the style you choose to the type of message.

For a professional email or correspondence of a more serious nature, clear fonts and dark font colors (black, navy blue) on a neutral, light background will reinforce the professional effect. Speaking of professional effect, always stay responsive with email forwarding!

If your message is more lighthearted, or addressed to friends and family, you can give your creativity free rein by adding patterns or opting for warm, cheerful colors.

How to Change Outlook Theme and Microsoft Theme

Here are our answers to three frequently asked questions about changing the overall appearance of Outlook!

How Do I Change the Appearance of Outlook 365?

To change the overall Microsoft theme of Outlook, go to File > Options > General, then select your Office theme (colorful, dark gray, black, or white). You can also change the background of your email using custom color options.

How Do I Enable Dark Mode in Outlook 365?

Go to File > Options > General, then go to the Customize your copy of Microsoft Office section. You can then choose the black theme in Office Theme to switch from light mode.

How Do I Change the Display of Emails in Outlook 365?

Go to the View tab, then click on View Settings. You can change the layout, font size, and organization of messages.

Want to add an automatic email signature to your emails? Find out how to add an Outlook signature.

Change Colors in Outlook

Make way for colors! Here's how to change the colors of different elements in Outlook.

How Do I Change the Outlook Colour Scheme?

flèche qui pointe vers le basOutlook 365 for Windows

  • Go to File > Options > General.
  • In Office Theme, choose your background (colored, gray, black, or white).

flèche qui pointe vers le basOutlook 365 for Mac

On Mac, Outlook automatically matches the macOS system theme: it is not possible to customize the background color. However, you can enable dark mode in System Preferences.

flèche qui pointe vers le basOutlook Web

  • Go to Settings > View all Outlook settings > General
  • Under Appearance, select your theme.

Changing Outlook Background Color

flèche qui pointe vers le basOutlook 365 for Windows

  • In a new email, go to File > Options > Page Color, then choose your color.
  • You can also choose a theme by going to Options > Themes.

flèche qui pointe vers le basOutlook 365 for Mac

  • Open a new email.
  • Go to Format > Background and select your color.

Please note: this option only works for messages in HTML format.

flèche qui pointe vers le basOutlook Web

  • Open a new email.
  • Click on the three dots, then on Show formatting bar > ... > Highlight color or Message background.

How Do I Change the Font Color in Outlook?

flèche qui pointe vers le basOutlook 365 for Windows

  • Go to File > Options > Mail > Font.
  • Select your font colors for new messages, replies, etc.
  • You can also set a custom color for specific needs.

flèche qui pointe vers le basOutlook 365 for Mac

  • Go to Outlook > Preferences > Fonts.
  • Choose the font color based on the type of message.

flèche qui pointe vers le basOutlook Web

In Outlook Web, you can simply use the formatting bar above the message composition window. It is not possible to set a default font color in this version of Outlook.

How Do I Change the Calendar Color in Outlook?

flèche qui pointe vers le basOutlook 365 for Windows and Mac

  • Go to the Calendar tab.
  • Right-click on your calendar name, then go to Color and set your color.

flèche qui pointe vers le basOutlook Web

  • Select the three dots next to the calendar name.
  • Go to Color and choose your color.

There you have it! Now you know how to use colors to create a messaging space and emails that reflect your personality! To keep up the creative momentum, check out our email signature tool for Outlook 365.

About the author
About Letsignit
Letsignit is an email signature management solution that empowers organizations to turn employee email signatures into a dynamic and personalized engagement channel for their brands and campaigns.

Questions
Fréquentes

1

Is it possible to track the number of clicks on email signatures?

Yes, with the 'Campaigns' offer, it is possible to track the number of clicks on the email signatures of all your employees in the 'Statistics' area of the platform.

You can then access a detailed or global view of the number of clicks on the email signatures of each employee. You can use the search option to target a specific signature or a given period. Finally, you have the possibility to export all statistics to an Excel document.

If you launch campaigns with banners inserted in your email signatures, you can also access their performance via this same space.

2

Can we add links to social networks, our website, and appointment-setting applications such as Calendly?

With Letsignit, you can easily add social network icons in your collaborators' email signatures and link to your company pages. Also, our "attributes" feature allows you to manage personalized URLs for each of your collaborators such as their individual LinkedIn profile.

And that's not all: you can add links to an appointment-setting application, allow your customers to leave reviews easily, and integrate our 'Chat on Teams' widget to let anyone start a discussion via Microsoft Teams chat.

3

Can employees update their signature information themselves (number, function, etc.)?

It’s up to you! As an administrator of the Letsignit platform, you choose whether or not to grant modification rights to your employees. These permissions are managed on an attribute-by-attribute basis, which means that you can decide to allow the employee to change their phone number, but not the address of your premises, for example.

This feature applies to all attributes in your directory, including custom attributes created on Letsignit. When your employees change one or more attributes, your directory is obviously not affected.

4

Why it is important to standardize our email signatures on a large scale to ensure our identity and brand image?

It often happens that employees make their email signature their own: custom format, bad fonts, colors inconsistent with the brand standards... all of this has an impact on your brand!

A consistent visual identity is considered authentic and outperforms a perceived weak one by 20%. And, your customers are 2.4 times more likely to buy your products.

With Letsignit, take back control over your brand identity by standardizing all your email signatures. Our tool has many features that allow you to customize your signatures by department, by audience or by subsidiary. Not to mention the possibility of carrying out campaigns within your email signatures thanks to our Campaign offer.

5

What is the user experience like for our employees?

What is the user experience like for our employees?

  • If you opt for the Letsignit Add-in for Outlook, they will have a dedicated space in their Outlook account where they will be able to view the signatures and campaigns assigned to them.
  • If you opt for the Letsignit Desktop APP, they will be able to preview all their signatures and campaigns in this space. If they want to change their default signature to another one when sending an email, this will be done in their signature library in Outlook.

In both cases:

  • They preview their signature before sending an email and choose from signatures assigned to them.
  • Based on the permissions granted, they will also be able to modify their personal information such as their name, position, or address in these spaces.

In short, they have autonomy in their email signature, but you keep control on the field, signatures, and banners they can edit or use.

6

Can my employees have multiple signatures available to them?

With our "multi-signature" feature, your employees can benefit from multiple email signatures. No technical manipulation is required. Thanks to our Add-in for Outlook or the desktop app, they can change their email signatures as they wish with just a few clicks.

Regarding the creation of email signatures, you can make several variations such as:

Everything has been thought of to go further in the personalization process based on the recipient of your emails.

7

Regarding “Green IT,” have you implemented measures to limit the digital footprint of email signatures?

If sending emails has an impact, non-optimized email signatures also have an impact. An unsuitable format or an image that is too heavy considerably increases the size of your signatures... and therefore, your emails.

As a responsible economic actor, we contribute to reducing our CO2 emissions and those of our customers in several ways:

  • Optimization of the weight of signatures and campaigns in emails.
  • Green features: lightening of signatures during response/transfer emails, possibility of not embedding images, implementation of lighter signatures for internal exchanges.
  • Integration of a 'Switch to Teams' widget to encourage your employees to continue their exchanges via chat, rather than email.

As we are increasingly involved in sustainability initiatives, our priority in 2023 is to develop even more green IT functionality.

8

Regarding “Green IT,” have you implemented measures to limit the digital footprint of email signatures?

If sending emails has an impact, non-optimized email signatures also have an impact. An unsuitable format or an image that is too heavy considerably increases the size of your signatures... and therefore, your emails.

As a responsible economic actor, we contribute to reducing our CO2 emissions and those of our customers in several ways:

  • Optimization of the weight of signatures and campaigns in emails.
  • Green features: lightening of signatures during response/transfer emails, possibility of not embedding images, implementation of lighter signatures for internal exchanges.
  • Integration of a 'Switch to Teams' widget to encourage your employees to continue their exchanges via chat, rather than email.

As we are increasingly involved in sustainability initiatives, our priority in 2023 is to develop even more green IT functionality.

Frequently asked questions

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