code: public final void setDialogHeaderBackgroundColor(@ColorInt final int color) {
          this.dialogHeaderBackground = new ColorDrawable(color);
          this.dialogHeaderBackgroundBitmap = null;
          this.dialogHeaderBackgroundId = -1;
          this.dialogHeaderBackgroundColor = color;
      }
docs: Sets the background color of the header of the preference's dialog.
  
  @param color
  The color, which should be set, as an {@link Integer} value or -1, if no custom color
  should be set