code: private void obtainBreadCrumbBackgroundColor() {
          int color;
  
          try {
              color = ThemeUtil.getColor(this, R.attr.breadCrumbBackgroundColor);
          } catch (NotFoundException e) {
              color = ContextCompat.getColor(this, R.color.bread_crumb_background_light);
          }
  
          setBreadCrumbBackgroundColor(color);
      }
docs: Obtains the background color of the toolbar, which is used to show the bread crumb of the
  currently selected navigation preference, when using the split screen layout, from the
  activity's theme.