MainWindowViewModel - Brush

MainWindowViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;

namespace WpfApplication1
{
  public class MainWindowViewModel
  {
    public Brush Background { get; private set; }

    public MainWindowViewModel()
    {
      Background = new SolidColorBrush(Colors.Aqua);
    }
  }
}