Office 365 provides a fantastic set of tools for your business. Out of the box it has a clean, modern look, with Microsoft’s trademark blue and black color scheme. Tenant administrators can easily update the theme settings to match their company’s brand.
Log in to the Admin Center https://portal.office.com/adminportal/
Choose “Settings” > “Organizational Profile” in the left navigation, and then click “Edit” next to “Manage custom themes for your organization“.
Select custom logo image
Upload your company logo or another image. It will appear in the center of the “suite bar” at the top of all your Office 365 browser applications. The image must be in .jpg, .png, or .gif format. It should be 200 X 30 pixels, and cannot be larger than 10 KB.
Enter a URL that users can link to if they click on the custom logo image. I recommend linking to the home page of a SharePoint intranet site, but you can put any URL here.
Select background image
You can also select a background image that will display in the suite bar across the top. This image needs to be jpg, .png, or .gif format. It can be a maximum of 1366 x 50 pixels and cannot be larger than 15 KB.
Preserve your theme settings tenant-wide
You can prevent users from overriding custom theming with their own theme by checking the box. If you leave the box un-checked, that will allow users to set their own themes.
Set custom colors
You can set accent colors, navigation bar background, and colors of text, icons, and app the launcher icon. You can enter hexadecimal codes, or RGB numbers directly if you know them (ask your Marketing department), or you can use a color slider/selector to pick the colors.
Display User Name
One of the newest settings, allows you to choose whether or not you want to show the logged in user’s full name near their profile picture. Simply turn this “On” or “Off” for all users.
It’s quick and easy to configure the theme settings and make your Office 365 environment feel like home!