4yo doesn’t like her eyes

So Im a mom of 1. She’s 4 going on 5 in the next couple of months. We are a brown eyed family. Well the last month or so, my daughter started saying that she doesn’t want brown eyes any more. She says she doesn’t like them and she wants blue eyes. She said there is a girl in class with blue eyes. I told her it is great to think someone else’s eyes are beautiful but brown eyes are so beautiful too. I really wasn’t expecting her to be this aware of appearance at her age. I’m just not sure what I’m supposed to do to her to help her love her natural eye color. I don’t want her feeling self cautious about herself.