WPF Color Picker Construction Kit

<Window x:Class="ColorPickerControls.Dialogs.ColorPickerStandardWithAlphaDialog"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="Color Picker" Height="334" Width="480"    xmlns:Pickers="clr-namespace:ColorPickerControls.Pickers" WindowStyle="SingleBorderWindow" ResizeMode="NoResize">
    <Grid Background="#FFE8E8E8">
        <Grid.RowDefinitions>
            <RowDefinition Height="270" />
            <RowDefinition Height="30" />
        </Grid.RowDefinitions>
        <Pickers:ColorPickerStandardWithAlpha HorizontalAlignment="Left" x:Name="colorPickerFull" VerticalAlignment="Top" Margin="4,0,0,0"/>
        <StackPanel Orientation="Horizontal" Grid.Row="1" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="142,0,0,0">
        <Button Content="OK"  Height="23" HorizontalAlignment="Left" Margin="0,0,4,0" Name="btOk" VerticalAlignment="Top" Width="75" Click="btOk_Click" />
        <Button Content="Cancel" Grid.Row="1" Height="23" HorizontalAlignment="Left" Margin="8,0,0,0" Name="btCancel" VerticalAlignment="Top" Width="75" Click="btCancel_Click" /></StackPanel>
    </Grid>
</Window>