Since I see a lot of milk, because of the milk bank, I will tell you that
I have seen many colors of milk.  One women had green milk because she
was eating a lot of asparagus.  Another reason might be a lot of other
green vegetables.  There is nothing harmful in the milk.  Once had pink
milk from a mom who loved beets.  It comes in all colors.
Darlene Breed RN, BSN, IBCLC
Coordinator, Milk Bank/Breastfeeding Center
Worcester, MA