Is green poop normal for a newborn?
In the first 24 hours greenish black poop is normal as this is called meconium. In the first days of life it is perfectly normal for your baby's poop to range in colors but in a breastfed baby poops should be mustard color and seedy looking. After that green poop could be a sign that your baby is getting too much foremilk, if you are breastfeeding. Formula fed babies will have a tan-ish colored poop and will go less often than breastfed babies.
Sometimes green poop can be an indication of a dairy intolerance but it is usually accompanied with other symptoms classic of food sensitivities: eczema, wheezing, colic like symptoms, stools that are green and mucousy. In this a case, consult with your doctor.