I tried taking a picture, but this is the only good one I got. I'm also not sure if the image will still stay for long or if it wont show up after a while.
Both of them look like that, by the way,
I would not be surprised if the nipple color changes, perhaps getting darker (on average).
You might also want to apply some cold pressed coconut oil on them if you have any, in case it is older dried skin and underneath looks more normal.