I recently saw a girl with skimmed milk. It was yellowish in color. Th…

I recently saw a girl with skimmed milk. It was yellowish in color. The baby is sleeping all night. My mom said it's very fatty for her. My milk is white, slightly blue in color. She says it's not filling so he wakes up every hour because he gets thirsty and hunger comes back. Because of this, he wakes up and eats constantly. Do you think the color depends on fat content? Today I gave him formula before breastfeeding, then a bottle. In total, he drank a maximum of 60 ml. I didn't force him with a bottle, I gave him breast milk. He didn't take it and fell asleep... maybe he just eats little? Or is my milk not