There's no "Voyage to the Bottom of the Sea color." The phrase is the title of Irwin Allen's 1964–1968 ABC television series (and 1961 film) about the futuristic nuclear submarine SSRN Seaview and its adventures battling monsters, aliens, and Cold War threats.
Pioneered "monster of the week" sci-fi TV, launched Allen's "Action-Adventure" franchise (Lost in Space, Time Tunnel), and cemented the "undersea adventure" genre. The Seaview model remains a collector's grail.
So if you're asking about a paint color, Pantone, or ocean hue—it doesn't exist. It's a show. A gloriously campy, submarine-shaped time capsule.