HEX16色转Bursh：
Brush brush = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FFFFFF"));
RGB三原色转Bursh：
Brush brush = new SolidColorBrush(Color.FromRgb(255, 255, 255));
HEX16色转Bursh：
Brush brush = (Brush)new BrushConverter().ConvertFromString("#FFFFFF");
Color转Bursh：
Brush brush = new SolidColorBrush(Colors.White));
原文：https://www.cnblogs.com/lionwang/p/9090132.html