Sasuke also had blue hair. Whatever happened to that?
I guess time skip, age, and Sasuke's homosexual preference affected his scalp.
He has black hair with a blue tint, that's different. Also seriously the joke about Sasuke being gay is becoming old. If we're going on that route, I can easily say that Naruto is gay too, because hey guess what? He's the one chasing Sasuke, he's the one constantly saying he's going to get him back and Sasuke was his motivation to get stronger.
Yet, he isn't called gay.... Just saying :shrug:
OT: No she's not an Uchiha. She's a Hyuuga. With your logic, that means that Temari and Deidara are siblings of Minato, because guess what? They have blond hair! Having a specific colour of hair doesn't automatically mean you're a member of a particular clan