brown, chestnut-brown
¿Crees que ese pelo castaño es muy bonito?
Do you think that brown hair is really beautiful?
Nos estamos tiñendo el pelo castaño.
We are dyeing our brown hair.
Tienes el cabello más castaño que negro.
Your hair is more brown than black.
— Un asunto de familia (2018)
Tom se tiñó el pelo castaño oscuro.
Tom dyed his hair dark brown.
Mary tiene el pelo corto, castaño y rizado.
Mary has short, brown, curly hair.
She had dark brown hair.