Colorverse Sea of Tranquility from Season 1 Spaceward is a medium lime green fountain pen ink with medium shading. It dries in 30 seconds in a medium nib on Rhodia and has an average flow. Colorverse ink is made in Korea. Mare Tranquillitatis (Latin for Sea of Tranquility) is a lunar mare that sits within the Tranquillitatis basin on the Moon. Lunar maria (singular: mare) are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for 'seas', by early astronomers who mistook them for actual seas. Mare Tranquillitatis was the landing site for the first manned landing on the Moon on July 20, 1969. After astronauts Neil Armstrong and Buzz Aldrin made a soft landing in the Apollo 11 Lunar Module nicknamed Eagle, Armstrong told flight controllers on Earth, "Houston, Tranquility Base here. The Eagle has landed."  Dye Based Fountain Pen Ink RGB Color: 118, 152, 86 Web Color: #769856 Pantone Color: 362 U Surface Tension: 53.0 dyne/cm 20 ℃ PH: 8.4 Brand Colorverse Ink Name Sea of Tranquility Country of Origin Korea Color Green Dry Time 30 Seconds (Pilot Vanishing Point Medium Nib on Rhodia Paper) Flow Average Shading Medium Sheen No Shimmer No Limited Edition No Water Resistance Low Iron Gall  No Pigment No Read a full review of this ink from The Well-Appointed Desk.