Scarlet

Members of the Prydonian Chapter were distinguished from the other Chapters by their scarlet and orange robes. (TV: The Deadly Assassin) Morbius, though a member of the Patrex Chapter, (PROSE: The Legacy of Gallifrey) wore a scarlet sash in his first incarnation as part of his outfit as "the General", replacing the golden Sash of Rassilon which had been taken from him upon his exile from Gallifrey. (PROSE: Warmonger)

Gwen Cooper wore a scarlet shirt throughout the 21st century Dalek invasion. (TV: The Stolen Earth, Journey's End)

Amy Pond wore a scarlet tank top under her chocolate brown leather jacket. (TV: Victory of the Daleks; GAME: City of the Daleks, Blood of the Cybermen, TARDIS, Shadows of the Vashta Nerada)

Leela wore a scarlet cravat with her walking suit. (TV: The Talons of Weng-Chiang)

The Tenth Doctor wore a scarlet shirt. (TV: 42)

The Twelfth Doctor wore a scarlet dress shirt. (TV: The Pyramid at the End of the World)

In his "War Child" incarnation, the Master wore a scarlet shirt under his black jacket. (COMIC: The Organ Grinder)

The Monk wore a scarlet robe. (PROSE: The Persistence of Memory)

Eve's skin was scarlet. (TV: The Mad Woman in the Attic)