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Windows Phone ThemeManager allows for easy overriding of the Dark or Light themes
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Jeff Wilcox's wp-thememanager is a Windows Phone library that allows for overriding the theme to be Dark, Light, Inverted, etc. as well as now enabling you to set a custom theme to override the default Phone brushes.

The NuGet packages have been downloaded tens of thousands of times and power great apps for the platform including Instagram and eBay.

The library also supports overriding the Accent color and brush for use in custom-branded applications.

NuGet versions 1.5 and lower are designed for Windows Phone 7.5 apps, while all recent versions should only be used for Windows Phone 8 apps.

Windows Phone 8.1 Note

This library should not be necessary for phone 8.1 apps. It is primarily intended to offer theme overriding to Windows Phone 8 apps at this time.

Announced at the //build conference in San Francisco, the latest Windows Phone 8.1 operating system supports theme overriding in the core platform.

There's no longer reason to use wp-thememanager when building Windows Store apps for the phone or Universal apps.

How to use

Just call ThemeManager.ToLightTheme() or ThemeManager.ToDarkTheme() or ThemeManager.InvertTheme.

Although this isn't designed to handle custom themes, branding scenarios, etc., it wouldn't be too hard to add that support and I'd be interested in a simple, lightweight pull request in that case.

The applied resources only affect mostly chrome colors, foreground, background, but not the accent color.

For more information check out

Custom Themes

This allows you to style your app how you used to in 7.0, but taking the ThemeResources.xaml from C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.1\Design (or just Program Files if on a x86 system) and change the colours to suit your app.

What makes the custom theme support cool is you can embed your altered ThemeResources.xaml as a MergedDictionary in your app.xaml, this allows you to see those changes at design time and use them easily in Blend.

To then set the custom theme, just call ThemeManager.SetCustomTheme(rd, Theme.Light) where rd is a ResourceDictionary version of your xaml. You also need to specify whether to override the Dark or Light theme, this is a fall back for if you have removed some of the colours from your Resource Dictionary.

NOTE: Do not put anything else in your modified ThemeResources.xaml that you will later need (if putting it in the MergedDictionary section) as part of the process is to remove the MergedDictionary once the theme has been set. For some reason if you don't the PhoneForegroundBrush doesn't stay set.


Original Implementation created by Jeff Wilcox.

  • Custom Theme support added by Scott Lovegrove
  • Windows Phone 8 fixes by Shawn Oster
  • Background image brush support by @rowdynl


A built assembly is also available on NuGet: PhoneThemeManager

NuGet Binary

The binary is super easy to use. With NuGet just add the PhoneThemeManager package reference.

NuGet Source File

Instead of adding yet another assembly to your project, just add the single source file (or add it to your existing shared library, etc.) by using the PhoneThemeManager.Source package.


Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.



  • Windows Phone 8-only support.


  • Adds new feature, Background brush and image brush support via the SetBackground function.


  • Accent color corrections for 8.0.


  • Some colors/themes should only be present in Windows Phone 7.x as they were removed/changed in 8.0. Adds a logic check that was contributed.


  • Fixes an issue with the light theme and setting to dark w.r.t. the system tray progress indicator
  • Removes a throw when reapplying the theme.


  • Merged with fixes from others.


  • Adds Custom Theme support. Use ThemeManager.SetCustomTheme(...)


  • Adds Accent Brush features and functionality. Use the ThemeManager.SetAccentColor(...) overrides.


  • Initial implementation
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