aurora-sharp-desktop/Aurora/App.xaml

<?xml version="1.0" encoding="utf-8"?>
<Application
     xmlns="http://xamarin.com/schemas/2014/forms"
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
     xmlns:converters="clr-namespace:Aurora.Design.Converters"
     x:Class="Aurora.App">
    <Application.Resources>
        <ResourceDictionary><!-- GENERAL COLORS -->
            <Color
                 x:Key="WhiteColor">#FFFFFF</Color>
            <Color
                 x:Key="BlackColor">#000000</Color><!-- THEME COLORS -->
            <Color
                 x:Key="AccentColor">#F5C210</Color>
            <Color
                 x:Key="ToolbarColor">#151C25</Color>
            <Color
                 x:Key="BackgroundColor">#1E2634</Color>
            <Color
                 x:Key="DarkBackgroundColor">#151C25</Color>
            <Color
                 x:Key="MenuBackgroundColor">#44545C</Color><!-- CONVERTERS -->
            <converters:InverseBoolConverter
                 x:Key="InverseBoolConverter"/>
            <converters:ToUpperConverter
                 x:Key="ToUpperConverter"/>
            <StyleSheet
                 Source="App.css"/>
        </ResourceDictionary>
    </Application.Resources>
</Application>