Xamarin.Forms-Samples/FormulaOneApp/FormulaOneApp.WinPhone/Themes/Pivot.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:primitives="clr-namespace:Microsoft.Phone.Controls.Primitives;assembly=Microsoft.Phone"
    xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
    mc:Ignorable="d">

    <SolidColorBrush x:Key="PivotBackground" Color="#0092FF"/>

    <Style x:Key="PivotStyle" TargetType="phone:Pivot">
        <Setter Property="Margin" Value="0"/>
        <Setter Property="Padding" Value="0"/>
        <Setter Property="Foreground" Value="{StaticResource PhoneForegroundBrush}"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <Grid/>
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="phone:Pivot">
                    <Grid HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
                          VerticalAlignment="{TemplateBinding VerticalAlignment}">
                        <Grid.RowDefinitions>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="Auto"/>
                            <RowDefinition Height="*"/>
                        </Grid.RowDefinitions>
                        <Grid Background="{StaticResource PivotBackground}" 
                              CacheMode="BitmapCache"
                              Grid.RowSpan="2" />
                        <Grid Background="{TemplateBinding Background}" 
                              CacheMode="BitmapCache"
                              Grid.Row="2" />
                        <ContentPresenter ContentTemplate="{TemplateBinding TitleTemplate}"
                                          Content="{TemplateBinding Title}"
                                          Margin="24,17,0,-7"/>
                        <primitives:PivotHeadersControl x:Name="HeadersListElement"
                                          Grid.Row="1"/>
                        <Grid Grid.Row="2">
                            <ItemsPresenter x:Name="PivotItemPresenter"
                                        Margin="{TemplateBinding Padding}" />
                        </Grid>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style TargetType="phone:PivotItem">
        <Setter Property="Margin" Value="-12, -2, 0, 0"/>
    </Style>
    
</ResourceDictionary>