Background colour not changing in wpf help me

Question

Hello Team,

Background colour not changing in wpf help me

<Window x:Class="WpfResources.MainWindow"
        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:local="clr-namespace:WpfResources"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
        <SolidColorBrush Color="Red" x:Key="ButtonColorRed"></SolidColorBrush>
    </Window.Resources>
    <Grid>
        <Button Width="200" Height="100" Margin="47,68,553,266" Background="{StaticResource ButtonColorRed}" ></Button>
        <Button Width="200" Height="100" Margin="332,90,268,244" Background="{StaticResource ButtonColorRed}" >
            <Button.Style>
                <Style TargetType="Button">
                    <Setter Property="Background" Value="Blue">
                    </Setter>
                </Style>
            </Button.Style>
        </Button>
    </Grid>
</Window>

Thanks in Advanace

Meghana.