Add Nightshade V2 (#9216)

Author: Lamparter

src/Files.Uwp/Files.Uwp.csproj

@@ -1201,6 +1201,10 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </Content>
+    <Content Include="Themes\Nightshade.xaml">
+      <Generator>MSBuild:Compile</Generator>
+      <SubType>Designer</SubType>
+    </Content>
     <Content Include="Themes\Red Wave.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>

src/Files.Uwp/Themes/Nightshade.xaml

@@ -0,0 +1,50 @@
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:BelowWindows10version1809="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractNotPresent(Windows.Foundation.UniversalApiContract, 7)"
+    xmlns:Windows10version1809="http://schemas.microsoft.com/winfx/2006/xaml/presentation?IsApiContractPresent(Windows.Foundation.UniversalApiContract, 7)">
+    <ResourceDictionary.ThemeDictionaries>
+        <ResourceDictionary x:Key="Default">
+            <!--  Background Resources  -->
+            <SolidColorBrush x:Key="RootBackgroundBrush" Color="#2c303b" />
+            <Color x:Key="SolidBackgroundFillColorBase">#2c303b</Color>
+            <Color x:Key="SolidBackgroundFillColorSecondary">#373c4a</Color>
+            <Color x:Key="SolidBackgroundFillColorTertiary">#373c4a</Color>
+            <Color x:Key="SolidBackgroundFillColorQuarternary">#535b70</Color>
+            <SolidColorBrush x:Key="SolidBackgroundFillColorBaseBrush" Color="{ThemeResource SolidBackgroundFillColorBase}" />
+            <SolidColorBrush x:Key="SolidBackgroundFillColorSecondaryBrush" Color="{ThemeResource SolidBackgroundFillColorSecondary}" />
+            <SolidColorBrush x:Key="SolidBackgroundFillColorTertiaryBrush" Color="{ThemeResource SolidBackgroundFillColorTertiary}" />
+            <SolidColorBrush x:Key="SolidBackgroundFillColorQuarternaryBrush" Color="{ThemeResource SolidBackgroundFillColorQuarternary}" />
+            <Color x:Key="SolidBackgroundAcrylic">#535b70</Color>
+            <!--  Accent Color  -->
+            <Color x:Key="SystemAccentColor">#0f7b6e</Color>
+            <Color x:Key="SystemAccentColorDark1">#0f7b6e</Color>
+            <Color x:Key="SystemAccentColorDark2">#084840</Color>
+            <Color x:Key="SystemAccentColorDark3">#172f23</Color>
+            <Color x:Key="SystemAccentColorLight1">#16ae9d</Color>
+            <Color x:Key="SystemAccentColorLight2">#4b9573</Color>
+            <Color x:Key="SystemAccentColorLight3">#65c99b</Color>
+        </ResourceDictionary>
+        <ResourceDictionary x:Key="Light">
+            <!--  Background Resources  -->
+            <SolidColorBrush x:Key="RootBackgroundBrush" Color="#eaefff" />
+            <Color x:Key="SolidBackgroundFillColorBase">#aaeaefff</Color>
+            <Color x:Key="SolidBackgroundFillColorSecondary">#aaeaefff</Color>
+            <Color x:Key="SolidBackgroundFillColorTertiary">#eaefff</Color>
+            <Color x:Key="SolidBackgroundFillColorQuarternary">#eaefff</Color>
+            <SolidColorBrush x:Key="SolidBackgroundFillColorBaseBrush" Color="{ThemeResource SolidBackgroundFillColorBase}" />
+            <SolidColorBrush x:Key="SolidBackgroundFillColorSecondaryBrush" Color="{ThemeResource SolidBackgroundFillColorSecondary}" />
+            <SolidColorBrush x:Key="SolidBackgroundFillColorTertiaryBrush" Color="{ThemeResource SolidBackgroundFillColorTertiary}" />
+            <SolidColorBrush x:Key="SolidBackgroundFillColorQuarternaryBrush" Color="{ThemeResource SolidBackgroundFillColorQuarternary}" />
+            <Color x:Key="SolidBackgroundAcrylic">#eaefff</Color>
+            <!--  Accent Color  -->
+            <Color x:Key="SystemAccentColor">#16ae9d</Color>
+            <Color x:Key="SystemAccentColorDark1">#0f7b6e</Color>
+            <Color x:Key="SystemAccentColorDark2">#16ae9d</Color>
+            <Color x:Key="SystemAccentColorDark3">#31624b</Color>
+            <Color x:Key="SystemAccentColorLight1">#16ae9d</Color>
+            <Color x:Key="SystemAccentColorLight2">#4b9573</Color>
+            <Color x:Key="SystemAccentColorLight3">#16ae9d</Color>
+        </ResourceDictionary>
+    </ResourceDictionary.ThemeDictionaries>
+</ResourceDictionary>