Yellow is normal for ebf babies, green as well usually when they aren’t well so possibly got a tummy bug?
How old is the baby? Yellow/mustard is normal for BF babies. Green is normal the first few days, after that it might mean that she's getting too much foremilk, ie the first bit of milk that comes out. This happens when she's not on the boob for long, so she doesn't have the chance to drink the fattier milk that comes later
@Giorgia almost 6 months
@Dianne 6 months on Saturday
How old is your baby?