WPF Ribbon Application Menu Button Color

Question

I have a WPF \ C# App with a ribbon.

I want to change the ribbon's main button's color.

Ribbon Application Menu Button

Any ideas?

<UserControl x:Class="AccountantDatabase.Controls.BarRibbon"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:AccountantDatabase.Controls"
             mc:Ignorable="d">
    <Ribbon SelectedIndex="0" IsMinimized="True">
        <Ribbon.ApplicationMenu>
            <RibbonApplicationMenu KeyTip="A">
                <RibbonApplicationMenuItem Header="Options"
                    Click="RibbonMenuItemOptions_Click"/>
                <RibbonApplicationMenuItem Header="Exit"
                    Click="RibbonMenuItemExit_Click"/>
            </RibbonApplicationMenu>
        </Ribbon.ApplicationMenu>
        <RibbonTab Header="Home" KeyTip="H">
        </RibbonTab>
        <RibbonTab Header="Filter" KeyTip="F">
        </RibbonTab>
    </Ribbon>
</UserControl>

Answer 1

Solution:

<Ribbon>
     <Ribbon.ApplicationMenu>
         <RibbonApplicationMenu Background="Red" BorderBrush="Red">
             <!-- Content  -->
         </RibbonApplicationMenu>
     </Ribbon.ApplicationMenu>          
 </Ribbon>

Output:

Template for Ribbon: Link