public CIMColor DefaultGuideColor {get;}

{
  var lastToolActive = ApplicationOptions.LayoutOptions.KeepLastToolActive;
  var warnOnSurrounds = ApplicationOptions.LayoutOptions.WarnAboutAssociatedSurrounds;
  //eg <Install_Path>\Resources\LayoutTemplates\en-US
  var gallery_path = ApplicationOptions.LayoutOptions.LayoutTemplatePath;
  var defaultGuideColor = ApplicationOptions.LayoutOptions.DefaultGuideColor;
  //Note: Must be on QueuedTask.Run.
  var guideColor = ApplicationOptions.LayoutOptions.GetGuideColor();
}