SOLVED. YA Fantasy. A society floating in the sky of silver-skinned, blue-haired women. Everyone has three mothers. Main character falls to Earth (or something like it) and meets two siblings. Read around 2016 - 2019. [s]

[faith ☾]

I’ve been trying to find this for so long so help would be much appreciated! :)

[Kris]

The Cerulean by Amy Ewing?

Google search of Goodreads:
site:goodreads.com "young adult" "fantasy" "has three mothers"

[faith ☾]

Kris wrote: "The Cerulean by Amy Ewing?

Google search of Goodreads:
site:goodreads.com "young adult" "fantasy" "has three mothers""

Yes, thank you so much!

[Kris]

You're welcome. Glad you found your book, faith. Interesting how searching only for the unique part of your description ("has three mothers") narrowed down the results.