code: private void obtainNavigationDividerColor() {
          int color;
  
          try {
              color = ThemeUtil.getColor(this, R.attr.navigationDividerColor);
          } catch (NotFoundException e) {
              color = ContextCompat.getColor(this, R.color.preference_divider_color_light);
          }
  
          setNavigationDividerColor(color);
      }
docs: Obtains the color of the dividers, which are contained by the navigation.