Overcoat ettiquete/color?

I’m a college student picking up a wool overcoat for interviews this winter. I wear a navy suit w/ black shoes and belt. From what I could find, older threads lean towards charcoal or navy and are split on black, but most are 10+ years old so I’m not sure that still holds. Curious what people actually wear / what would be acceptable? Also open to recs on the type of overcoat