How do I leverage system.windows.media.colors to make a colorlistbox

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WPF

i want to fill a list box with rectangles for each color in Colors in the easyiest possible way

What I have tried:

<pre><Window x:Class="ColorListBox.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"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Window.Resources>
    </Window.Resources>
    <Grid>
        <StackPanel Orientation="Vertical">
            <ListBox ItemsSource="{Colors}" Height="100">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <Rectangle Width="100" Height="50" Fill="{Binding}" />
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
        </StackPanel>
    </Grid>
</Window>

this doesnt work