#but since I don't remember the source and might misremember take that with a grain of salt

[waitingforsecretsouls]

Forget about Celegorm hair colour discourse, my controversial take (in the sense of going against the main depiction found in fandom) is that Maglor and Curufin are brunettes (as is the Noldorin standard*).

Maglor is the only son of Fëanor without any kind of physical description whatsoever, implying he doesn't deviate from the norm in that regard, and Curufin is only ever said to resemble Feanor "very much in face" (HoME XII), i.e. sharing his fathers facial features, but is never noted for black hair the way Finwë ("he had black hair", HoME XII), Fëanor ("his hair raven-dark", The Silmarillion VI) and Caranthir ("he was black-haired as his grandfather", HoME XII) are.

The same also goes for Fingolfin and his children.

*I take dark brown (at most) as the "default", since every instance of black hair is specifically mentioned, similar to the other deviations from the norm such as Mahtan, Maedhros and the Ambarussa, or Míriel, or the Arafinwëans. So I find reading a simple "dark" (or lack of any description to the contrary, regarding Noldor) as "brown" the most plausible.