A little green in the poo?

Hi mommies and daddies. I had a question. My husband changed our son's diaper and it was yellow, but had green too. Like 3 to 1 ratio of green to yellow. This was his third poo today. The others were dark yellow/orange in color. He is only breastfed and this is our first time seeing this.

Is this a sign of the foremilk/hindmilk issue I've been hearing about? If so how do I fix this or is it too soon to tell. Indont wanna overreact but I'm a FTM so this is all so new to me. Should I post a picture of it? Help please!