Blue arms and legs

I was dropping off my daughter at my oldest daughters house.  I saw my grandsons legs and arms were blue and dusky looking.  I FREAKED OUT!!  I knew that it wasn't normal.  I had my daughter rush him to the Doctor.  He said it was poor circulation, however that didn't settle well with me.  I asked if he could see a specialist.  He has an appointment with him tomorrow, and I am sure he will need surgery.  I went and showed my cardioligist the pics of his legs, and he looked at me and said he needs help right away.  Thank GOD I didn't listen to the first diagnosis.