I'm starting to really not understand this whole god dna story.
So Rick Riordan says gods have no dna. That would mean that every demigod child must look exactly like their mortal parent. But it doesn't, since the entire Athena cabin has blonde hair and gray eyes and etc. So you could assume that the gods determine how the children look. I can "understand" that. After all, we all don't want to ship incest.
But in my opinion it makes no sense why the biological child of Sally and Paul Blofis has Percys ( who has Poseidons) sea-green eyes. It makes literally no sense. Neither Sally nor Paul have godly roots or are related to Poseidon. At least it was never said or mentioned. (Sally has blue eyes not green eyes) It doesn't make any sense that a god has a determination over the appearance of estelle, since she is in no way related to gods.
So either Sally and Poseidon had something together again. (Or a Sally-Poseidon-Paul thing).
It has to be at least something with Sally and Poseidon, because Sally was pregnant after all. We have learned in ToA The Hidden Oracle that when a god and a male mortal have a child together, the god becomes "pregnant". Kind of like that.
Or rick riordan wanted Estelle have green eyes like her big brother, just wrote his sh/t again without thinking a second time or that it interested him at all, as so often before.
By the way, salt and pepper hair simply means black hair with gray streaks. It is impossible that a child / baby already has gray streaks. Unless it has a specific inherited syndrome called piebaldism. This is a white strand in the hair that grows in the forehead area. Could be because Paul is also described with salt and pepper hair and he's only in his mid thirties.
Yeah, Ricks crap is bothering me or maybe he is a genius, will writing a new series but about Estelle being a demigod and make more money and cash but I don´t think so