UWP-Visual-Asset-Generator/UserControls/BackgroundColorUserControl.xaml

<ContentDialog
    x:Class="UWP_Visual_Asset_Generator.UserControls.BackgroundColorUserControl"
    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:local="using:UWP_Visual_Asset_Generator.UserControls"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:muxc="using:Windows.UI.Xaml.Controls"
    xmlns:tk="using:Microsoft.Toolkit.Uwp.UI.Controls"
    mc:Ignorable="d">

    <Grid>
        <StackPanel x:Name="contentgoeshere">
            <TextBlock
                Margin="8"
                HorizontalAlignment="Center"
                Text="Select Icon Background Colour" />
            <muxc:ToggleSwitch
                Margin="0,8"
                Header="Use Transparent Background"
                IsOn="{x:Bind mainViewModel.UseTransparentBackground, Mode=TwoWay}"
                OffContent="No - Select a colour below"
                OnContent="Yes - Transparent" />
            <ColorPicker
                IsAlphaSliderVisible="True"
                IsAlphaTextInputVisible="True"
                IsColorChannelTextInputVisible="False"
                IsEnabled="{x:Bind mainViewModel.UseColouredBackground, Mode=OneWay}"
                Color="{x:Bind mainViewModel.BackgroundColour, Mode=TwoWay}" />

            <tk:ImageEx
                x:Uid="preview"
                Width="120"
                Margin="8"
                Padding="24"
                Background="{x:Bind mainViewModel.BackgroundColourBrush, Mode=OneWay}"
                PlaceholderSource="/Images/Logo.png"
                PlaceholderStretch="Uniform"
                Source="{x:Bind mainViewModel.OriginalLogoImageSource, Mode=OneWay}"
                Stretch="Uniform"
                ToolTipService.ToolTip="Preveiew" />

            <muxc:Button
                x:Name="okButton"
                Margin="8"
                Padding="4"
                HorizontalAlignment="Stretch"
                Click="okButton_Click"
                Content="Ok" />
        </StackPanel>
    </Grid>
</ContentDialog>