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