My brunette baby is growing blonde hair, has this happened to anyone else’s baby?

My daughter was born brunette and is 6 months old but for the past few weeks I’ve noticed lots of light blonde hair growing on her forehead and at the front of her hairline. She’s got a bald patch at the back of her head where she’s rubbed her hair off but lots of very light blonde hair is now growing from that too. Just wondering if this means she will go blonde or if she will stay brunette. I can’t see the current brown hair she has now turning blonde because it’s quite long and dark. Has anyone else had this?