염색을 해 보려고 하는데 좀 특이한 색이거든요 회색이나 백발정도의 색인데, 이렇게 하려면 가격대가 어느정도일까요? 그리고 염색을 아직 한번도 안 해봤는데 색 빠지는거 금방 빠지나요?