App.xaml

<Application x:Class="SmartMerchant.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
             xmlns:local="using:SmartMerchant" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             d1p1:Ignorable="d" 
             xmlns:d1p1="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:vm="using:SmartMerchant.ViewModel">
  <Application.Resources>    
    <ResourceDictionary>
            <local:BooleanNegationConverter x:Key="BooleanNegationConverter" />
            <Color x:Key="MenuColor">#0b2027</Color>
            <SolidColorBrush x:Key="MyBlack" Color="{StaticResource MenuColor}" />
            <Color x:Key="NavColor">#FFCFD7C7</Color>
            <SolidColorBrush x:Key="MyGreen" Color="{StaticResource NavColor}" />
            <Color x:Key="ButtonColor">#63adf2</Color>
            <SolidColorBrush x:Key="MyBlue" Color="{StaticResource ButtonColor}" />
            <vm:ViewModelLocator x:Key="Locator" d:IsDataSource="True"  />
    </ResourceDictionary>
  </Application.Resources>
</Application>