Countly Enterprise can be white labeled, as opposed to Countly Lite, due to the latter's custom open-source license. In order to let Countly Enterprise, and match your company's brand assets, you have two options:

1. Using the White Labeling feature that comes with Countly Enterprise.
2. Creating your own theme 

Benefits of Rebranding Countly

White-labeling an application can provide several benefits,

1. Branding: Whitelabeling allows businesses to customize the application to match their brand identity. They can add their logos, colors, and other branding elements to create a consistent customer experience.
2. Time-saving: Whitelabeling an application can save businesses time, as they do not have to develop an application from scratch. They can quickly launch the application with their branding and start providing value to their customers.
3. Customization: Whitelabeling an application allows businesses to customize it to meet their needs. They can add or remove features, integrate with other systems, and modify the user interface to create a unique customer experience.

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White Labeling 

Countly Enterprise has a feature called White Labeling, which helps you change your user interface from within Countly without needing any extra code.

First of all, enable the feature. 

In the Sidebar, go to Management > Feature Management and enable the White Labeling feature toggle. Once you enable it, go to Management > Settings. Now, you can make the editions from the below screen.

You can change many visuals like the logo, page title, button, menu, and font colors here.

You can check this document which can help you create and manage themes.