The Shibboleth of Feanor mentions that
Fingon "wore his long dark hair in great plaits braided with gold".
(
Aegnor's hair, on the other hand, is said to have been "strong and stiff, rising upon his head like flames". Imagine an Elf with a punk hairstyle!
)
I've a feeling there may be more in the
Shibboleth and the notes thereto, but those are the two descriptions I remembered and could find with a quick glance.