Crimson

Crimson was a colour, a form of deep red. (AUDIO: Call Me Ishmael)

The War Doctor wore a crimson scarf when he and Petrella escaped a Dalek ambush led by a Supreme Dalek. (COMIC: Ambush)

The Seventh Doctor wore a crimson paisley scarf. (TV: Paradise Towers-The Greatest Show in the Galaxy)

Ace wore a crimson t-shirt with a v-neck collar when she encounters Cheetah People. (TV: Survival)

Amy Pond wore crimson scarfs. (TV: Vincent and the Doctor, The Pandorica Opens/The Big Bang)

Clara Oswald wore a crimson minidress when she and the Eleventh Doctor dealt with the destructive consequences of the Van Baalen salvage crew's tampering with the TARDIS. (TV: Journey to the Centre of the TARDIS)

Silurian commanders wore crimson vests. (TV: Cold Blood; GAME: The Eternity Clock)

Bonnie wore a crimson paisley scarf similar to the Seventh Doctor's when taking Osgood's form. (TV: The Zygon Inversion)

Li Shou Yuing wore crimson tights when she met the Seventh Doctor and Ace during their encounter with Morgaine and the Destroyer. (TV: Battlefield)

The Ringmaster of the Psychic Circus wore a crimson top hat. (TV: The Greatest Show in the Galaxy)

The Dream Lord wore a crimson bow tie when he appeared in the Eleventh Doctor's console room. (TV: Amy's Choice)

In the 20th century, Torchwood Three found a deep-lavender emotional amplifier. It pulsed crimson when it detected anger, amplifying it into rage. (PROSE: Slow Decay)

During the War in Heaven, Inquisitor Ishmael of the Order of Tarth'Rioshim wore crimson clothing, including an overcoat. (AUDIO: Call Me Ishmael)