When did your biracial get their skin color

Emily

Sounds weird but my 3.5 month old is african and white and very light. I’m super pale and she’s more my color than my boyfriends who is very dark! He makes jokes about her being his white baby, as she doesn’t really look like him I guess.

I’ve seen other mixed babies her age and they’re darker or have been since birth but heard that it can take a while?

She’s beautiful and we love her no matter her color I’m just curious as I don’t know!