Table of Contents
Summary
- Custom theming for model-driven apps using the modern look allows for branding alignment through color, font, and header style customization.
- Classic theming will not be supported in the modern look, necessitating a transition to custom modern themes.
- Custom theming enables a cohesive color scheme, customizable app header, custom logo integration, and font overrides.
- The customizations are applied via an XML web resource and scoped to the environment using specific settings.
- Organizations are encouraged to create new custom themes, update documentation, and report any issues through Microsoft Support.
Admin Impact: High
User Impact: Low
Release Start: 31 Mar 2026
Release End: 31 Mar 2026
Services: Power Apps
Category: Stay informed
Tags: New Feature
History
3/17/2026 Item Added to Message Center
Microsoft Message
Custom theming for model-driven apps using the modern, refreshed look has been available in preview since October 2023. This capability allows organizations to align model-driven apps with their branding by customizing colors, fonts, and app header styling using the Microsoft Fluent 2 design system. As of March 31, 2026, custom theming will reach general availability.
How does this affect me?
Classic theming is not honored with the modern, refreshed look, which is becoming mandatory for model-driven apps in April 2026. The supported theming replacement with the modern look is custom modern themes, which gives makers the ability to:
- Apply a cohesive color scheme across the app based on a single base color, including hyperlinks, primary buttons, active tab indicators, row selection, and hover effects.
- Customize the app header background and text colors, including hover, pressed, and selected states.
- Set a custom logo for the app header to reinforce organizational branding. Note: Custom logo support in the modern theme XML is currently rolling out and will be available in all regions by the end of April 2026.
- Override the default font used throughout the application.
These customizations are applied through an XML web resource and can be scoped to your environment using the Custom theme definition app setting.
What action do I need to take?
To take advantage of custom theming, we recommend doing the following:
- If your organization was using classic themes, create a new custom theme XML web resource that reflects your branding. Follow the steps in the documentation to apply it to your environment.
- Update internal documentation and training materials to reference the new custom theming approach instead of classic theming.
- Report any issues or unexpected behavior through Microsoft Support so we can investigate.
If you would like more information on this feature, please visit Use modern themes in Power Apps – Power Apps.