<Page xmlns:editors="using:Syncfusion.UI.Xaml.Editors">
    <Grid>
        <editors:SfDropDownColorPicker x:Name="colorPicker" 
                                       SelectedBrush="Blue" />
    </Grid>
</Page>

using Syncfusion.UI.Xaml.Editors;

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
        
        SfDropDownColorPicker colorPicker = new SfDropDownColorPicker();
        colorPicker.SelectedBrush = new SolidColorBrush(Colors.Blue);
        
        grid.Children.Add(colorPicker);
    }
}

// Subscribe to color change event
colorPicker.SelectedBrushChanged += ColorPicker_SelectedBrushChanged;

private void ColorPicker_SelectedBrushChanged(object sender, SelectedBrushChangedEventArgs e)
{
    var oldColor = e.OldBrush;
    var newColor = e.NewBrush;
    
    // Apply the selected color
    myElement.Background = newColor;
}

// User selects a color → apply to app background
SfDropDownColorPicker themeColorPicker = new SfDropDownColorPicker();
themeColorPicker.SelectedBrushChanged += (s, e) => 
{
    Window.Current.Content.Background = e.NewBrush;
};

<editors:SfDropDownColorPicker DropDownMode="Split"
                               Command="{x:Bind ApplyColorCommand}" />

<editors:SfDropDownColorPicker>
    <FlyoutBase.AttachedFlyout>
        <editors:DropDownFlyout>
            <editors:SfColorPicker BrushTypeOptions="LinearGradientBrush" 
                                   Width="250" />
        </editors:DropDownFlyout>
    </FlyoutBase.AttachedFlyout>
</editors:SfDropDownColorPicker>

<editors:SfDropDownColorPicker DropDownPlacement="TopEdgeAlignedRight" />

// When color is selected, immediately apply to target element
void ColorPicker_SelectedBrushChanged(object sender, SelectedBrushChangedEventArgs e)
{
    targetRectangle.Fill = e.NewBrush;
}

void ColorPicker_SelectedBrushChanged(object sender, SelectedBrushChangedEventArgs e)
{
    // Validate color meets requirements
    if (IsValidColor(e.NewBrush))
    {
        ApplyColor(e.NewBrush);
    }
    else
    {
        colorPicker.SelectedBrush = e.OldBrush; // Revert
    }
}

public ICommand QuickApplyCommand => new RelayCommand(() =>
{
    // Apply current selected color without opening dropdown
    ApplySelectedColorToTextSelection();
});