Added ability to change Entries background and foreground colors

ModernKeePass/Views/UserControls/ColorPickerUserControl.xaml

@@ -0,0 +1,18 @@
+<UserControl x:Name="UserControl"
+    x:Class="ModernKeePass.Views.UserControls.ColorPickerUserControl"
+    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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d">
+    <ComboBox x:Name="ComboBox" ItemsSource="{Binding Colors, ElementName=UserControl}" SelectionChanged="Selector_OnSelectionChanged">
+        <ComboBox.ItemTemplate>
+            <DataTemplate>
+                <StackPanel Orientation="Horizontal" Margin="0,0,10,0">
+                    <TextBlock Width="100" Text="{Binding ColorName}" Margin="0,0,10,0" />
+                    <Rectangle Width="100" Fill="{Binding ColorBrush}" />
+                </StackPanel>
+            </DataTemplate>
+        </ComboBox.ItemTemplate>
+    </ComboBox>
+</UserControl>

ModernKeePass/Views/UserControls/ColorPickerUserControl.xaml.cs

@@ -0,0 +1,62 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Media;
+
+// The User Control item template is documented at http://go.microsoft.com/fwlink/?LinkId=234236
+
+namespace ModernKeePass.Views.UserControls
+{
+    public sealed partial class ColorPickerUserControl
+    {
+        public struct Color
+        {
+            public string ColorName { get; set; }
+            public SolidColorBrush ColorBrush { get; set; }
+        }
+
+        public List<Color> Colors { get; }
+
+        public SolidColorBrush SelectedColor
+        {
+            get { return (SolidColorBrush)GetValue(SelectedColorProperty); }
+            set { SetValue(SelectedColorProperty, value); }
+        }
+        public static readonly DependencyProperty SelectedColorProperty =
+            DependencyProperty.Register(
+                "SelectedColor",
+                typeof(SolidColorBrush),
+                typeof(ColorPickerUserControl),
+                new PropertyMetadata(new SolidColorBrush(), (o, args) => { }));
+
+        public ColorPickerUserControl()
+        {
+            InitializeComponent();
+            Colors = new List<Color>();
+            var type = typeof(Windows.UI.Colors);
+            var properties = type.GetRuntimeProperties().ToArray();
+            foreach (var propertyInfo in properties)
+            {
+                Colors.Add(new Color
+                {
+                    ColorName = propertyInfo.Name,
+                    ColorBrush = new SolidColorBrush((Windows.UI.Color)propertyInfo.GetValue(null, null))
+                });
+            }
+            ComboBox.Loaded += ComboBox_Loaded;
+        }
+
+        private void ComboBox_Loaded(object sender, RoutedEventArgs e)
+        {
+            ComboBox.SelectedItem = Colors.Find(c => c.ColorBrush.Color.Equals(SelectedColor.Color));
+        }
+
+        private void Selector_OnSelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            var selectedItem = ComboBox.SelectedItem as Color? ?? new Color();
+            SelectedColor = selectedItem.ColorBrush;
+        }
+    }
+}