What will my newborn's poos be like?

I never got to see my son's poop when he was a newborn. The nurses told me that he pooped it all out before I had the honour to see it so it was only greenish in colour. Subsequently it became mustard in colour, before going to yellowish/brown since I switched him to formula. Ever since he has started on solids, his poop varies! Once, I fed him dragon fruit and it came out all pinkish with black little dots