This is the 3125th most frequent Spanish word.
rubio
Fair-haired or blonde.
'Rubio' describes hair color, specifically blonde.
Él tiene el cabello rubio.
He has blonde hair.
'Rubio' metaphorically describes the sand's golden color.
La playa tiene arena rubia.
The beach has golden sand.
'Rubio' functions as a proper noun, used as a surname.