What is this?

I pulled these out of my freezer earlier and noticed this weird color.

I have a big stash and frozen they all look yellowish and this is what it looks like thawed.

What is it? Is it bad to give my baby?

I would be devastated if I had to toss my whole stash!

When I have freshly pumped milk in the fridge it doesn’t look like this when the fat separates. Why would it be yellow and not the same color as freshly pumped milk that separates?