How to: Change Tab Background in DXTabControl and Keep the Default Gradient and Highlight Effects

Imports System
Imports System.Collections.Generic
Imports System.Configuration
Imports System.Data
Imports System.Linq
Imports System.Threading.Tasks
Imports System.Windows

Namespace DXTabControlExample
    ''' <summary> 
    ''' Interaction logic for App.xaml 
    ''' </summary> 
    Partial Public Class App
        Inherits Application

        Private Sub OnAppStartup_UpdateThemeName(ByVal sender As Object, ByVal e As StartupEventArgs)

            DevExpress.Xpf.Core.ApplicationThemeHelper.UpdateApplicationThemeName()
        End Sub 
    End Class 
End Namespace 

<dx:DXWindow
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core" 
        xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors" 
        xmlns:dxb="http://schemas.devexpress.com/winfx/2008/xaml/bars" 
        xmlns:dxcn="http://schemas.devexpress.com/winfx/2008/xaml/core/internal" 
        xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm" 
        dx:ThemeManager.ThemeName="MetropolisLight" 
        x:Class="DXTabControlExample.MainWindow" 
        Title="Colorized tabs" Height="350" Width="550">
    <Grid>
        <dx:DXTabControl Name="tabControl">
            <dx:DXTabItem Header="Coral" BackgroundColor="Coral"/>
            <dx:DXTabItem Header="Chocolate" BackgroundColor="Chocolate"/>
            <dx:DXTabItem Header="Cornsilk" BackgroundColor="Cornsilk"/>
            <dx:DXTabItem Header="SandyBrown" BackgroundColor="SandyBrown"/>
            <dx:DXTabItem Header="CadetBlue" BackgroundColor="CadetBlue"/>
            <dx:DXTabItem Header="Violet" BackgroundColor="Violet"/>
        </dx:DXTabControl>
    </Grid>
</dx:DXWindow>

<Application x:Class="DXTabControlExample.App" 
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
             StartupUri="MainWindow.xaml" Startup="OnAppStartup_UpdateThemeName">
    <Application.Resources>

    </Application.Resources>
</Application>