Themes for Syncfusion WinUI Controls

27 Apr 20215 minutes to read

Themes provides a sense of visual continuity for the Windows apps.
It allows to customize the appearance of the application.
The theme affects the colors of the Control’s background, foreground, border brush, font etc.

Supported themes

Syncfusion WinUI controls supports Light and Dark themes.

Light theme

Light theme for WinUI controls

Dark Theme

Dark theme for WinUI controls

Applying themes at application level

Theme for the whole application can be changed using the RequestedTheme property available in App.xaml.
Syncfusion control adopts to Theme setting, when it is applied through RequestedTheme property.

        xmlns:local="using:WinUIDemoApp" RequestedTheme="Dark">
sealed partial class App : Application

        public App()
            this.RequestedTheme = ApplicationTheme.Dark;


When the RequestedTheme property is not set, application will use the user’s system settings.

Applying themes for controls

Themes can also be applied for each framework element individually irrespective of the Application level themes.
It can be set using the RequestedTheme property available in UI Elements.
When the RequestedTheme property is set to Default it uses the Application.RequestedTheme value for the elements.

<syncfusion:SfDataGrid x:Name="datagrid" RequestedTheme="Dark"/>
public MainPage()
            this.datagrid.RequestedTheme = ElementTheme.Dark;


When the RequestedTheme value is set on a FrameworkElement, it will inherit to any elements that are nested within the element.

Theme resource

Syncfusion provides a theme resource file for all Syncfusion WinUI Project Reunion controls. By referring this file, appearance of the controls can be customized in application level.

Theme resource files for Syncfusion WinUI controls can be referred from this link.

Modify theme resource in application level

Refer the theme resources from the above link to obtain the required keys for customizing the control as desired, and then define the same keys with custom colors in application level.

The following example shows how to customize the ribbon control at the application level by using a ribbon theme resource file.

Default theme resource values

Key Value
SyncfusionRibbonTabMenuButtonBackground SystemChromeLowColor
SyncfusionRibbonTabMenuButtonForeground SystemBaseHighColor
SyncfusionRibbonTabBorderBrushSelected SystemAccentColor

Customized value

Key Value
SyncfusionRibbonTabMenuButtonBackground Green
SyncfusionRibbonTabMenuButtonForeground White
SyncfusionRibbonTabBorderBrushSelected Green

Now add the customized value in application root element’s resources

            <SolidColorBrush x:Key="SyncfusionRibbonTabMenuButtonBackground"
                                    Color="Green" />
            <SolidColorBrush x:Key="SyncfusionRibbonTabMenuButtonForeground"
                                    Color="White" />
            <SolidColorBrush x:Key="SyncfusionRibbonTabBorderBrushSelected"
                                    Color="Green" />        


Control with default theme resource

WinUI Ribbon default theme resource

Control with customized theme resource

WinUI Ribbon theme resource customization in application level