The fact that it's sort of a period piece for a period that never existed helps. Fantasy is handy that way. Aside from the trends around color grading and film

The fact that it's sort of a period piece for a period that never existed helps. Fantasy is handy that way. Aside from the trends around color grading and film stock, much of what gives the visuals a sense of being of a specific time are choices around clothes, hair, and makeup.