if (list.get(position).getSupplement().charAt(0) == '*' &&  list.get(position).getSupplement().charAt(1) == '*') {
            System.out.println("supplement : " + list.get(position).getSupplement());
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                holder.cardView.setCardBackgroundColor(context.getResources().getColor(R.color.colorPrimaryDark, null));
                notifyDataSetChanged();
            } else {
                holder.cardView.setCardBackgroundColor(context.getResources().getColor(R.color.colorPrimaryDark));
            }
        }