return Context->hdrs[Context->v2r[index_no]]->pair;
HEADER *h = Context->hdrs[Context->v2r[index_no]];  if (h->pair) return h->pair;  mutt_set_header_color (Context, h); return h->pair;
int index_color (int index_no){  return Context->hdrs[Context->v2r[index_no]]->pair;}