Scarlet
From Tardis Wiki, the free Doctor Who reference
Members of the Prydonian Chapter were distinguished from the other Chapters by their scarlet and orange robes. (TV: The Deadly Assassin)
Martha Jones wore a scarlet tank top. (TV: 42)
Gwen Cooper wore a scarlet shirt throughout the 21st century Dalek invasion. (TV: The Stolen Earth, Journey's End)
The Seventh Doctor wore a single breast waistcoat of scarlet brocade up to his death. (TV: Doctor Who)
The Master wore a scarlet t-shirt. (TV: The End of Time)
