digraph G {
  node [style=filled]
  abc [color=green]
  def [color="0.2,0.8,0.8"]
  ghi [color="#FF0000"]
  kl [color="#FF00007F"]
  mno [color=yellow, fontcolor="#FF00007F"]
  pqr [label=mno, color=yellow, fontcolor="#FF0000"]
  abc -> def [color="red:blue:#00FF00"]
}