(De) cabello negro y flacucho (flacuchos / flacucha / flacuchas) --- offensive
"Tiene pelo negro" means he/she/it has black hair. "Pelo oscuro" means "dark hair."
flaco ...
To say I am not dark in Spanish, you would say: I ser no oscuro
Translation of skinny guy: Hombre/chico flaco
flaca
the hair in spanish is EL PELO
Delgado for a male, delgada for a female.
Son flacos/as. (Male/Female).
"Brown hair" is "pelo marrón". "Brunette" would be "moreno/a". Actually is more like: Brown hair... pelo castaño... and then you can specify if it's dark or light: Dark Brown Hair: castaño oscuro Light Brown Hair: castaño claro.
Lauren es bajo/a con pelo moreno (male/female Lauren)
oscuro
flaco but if ur being polite you should say "delgado" =)