SolidColorBrush

单色画刷，Color属性设置其颜色

<Window x:Class="画刷.MainWindow"
        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"
        xmlns:local="clr-namespace:画刷"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded">
    <StackPanel>
        <Button Name="button1" Width="100" Content="Button"  VerticalAlignment="Top" Height="65" Margin="10,10,0,0" HorizontalAlignment="Left" >
            <Button.Background>
                <SolidColorBrush Color="LightBlue"></SolidColorBrush>
            </Button.Background>
        </Button>
    </StackPanel>
</Window>

  通过此设置将button按钮的背景色进行设置
        <Button.Background>
            <SolidColorBrush Color="LightBlue"></SolidColorBrush>
        </Button.Background>

在窗口加载时通过SolidColorBrush画刷修改button前景色

  private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            this.button1.Foreground = new SolidColorBrush(Colors.Red);
        }

运行后得到如下结果：