Fifty kilometres above the Venusian surface the pressure is about one bar and the temperature sits between 0 and 50 °C — the most Earth-like band anywhere off Earth, and the altitude NASA Langley's HAVOC study picks for a crewed aerostat. This is the design language of the envelope that floats there.

Everything is read against a bright, opaque yellow-white haze with no horizon and no night. The palette is sulphuric: the same acid that gives the deck its colour is what eats the habitat's solar panels. Type is instrument type — Plex Sans for interface, Plex Mono for pressure and pH, Space Grotesk for mission numerals — laid across long horizontal gauge strips instead of cards.