Black or dark green. After birth, the first stool a baby passes is black or dark green and tarry. This type of baby poop is known as meconium. Yellow-green. Your baby's poop may turn this color once the meconium stool has passed. Yellow. Breastfed newborns usually have seedy, loose stool that looks like light mustard. Yellow or tan. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.