Ultramarine (disambiguation)
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Ultramarine means "beyond the ocean" and is the name of a color pigment.
Ultramarine, Ultramarines, or Ultra Marines may also refer to:
- Ultra Marines, an introductory board game set in the Warhammer 40,000 universe
 - Ultramarine (album), the fourth studio album (2013) by Young Galaxy
 - Ultramarine (band), a British electronic and dance band (1989–present)
 - Ultramarine (novel), a book by Malcolm Lowry from 1933
 - Ultramarine Corps, an Authority-esque superteam in DC Comics
 - Ultramarine, a book of poetry by Raymond Carver from 1986
 - Ultramarines: A Warhammer 40,000 Movie, a film set in the Warhammer 40,000 universe
 - "The Ultramarines", a fictional chapter of Space Marines (Warhammer 40,000)
 - Nigritude ultramarine, a search engine optimization contest held in 2004