K.S.
I have three kids and my youngest had that where is legs and hands would turn blueish. The peditrician told me it was completely normal and that he was just sensitive to the the cold. My other two were born and raised in Arizona so I had no clue what it was but since he was born in Maryland it was cooler and he to this day has to stay warmer where the other kids are cool weather kiddos. Good luck.