Thank you for your query.
Do not panic.This is a normal phenomenon if the baby is breastfed.
The green colour is due to the excessive secretion of bile.
Use a probiotic
syrup for a few days.
Continue breast feeding as usual.There is nothing unusual in your baby and he does not need any cure.
Hope this answers your query.
If you have any other queries kindly direct them to me.
Wishing a speedy recovery.
Have a nice day.