Prussian blue

Prussian blue was a dark shade of blue.

The Eighth Doctor wore a double-breasted overcoat of Prussian blue moleskin round the Kotturuh crisis, (AUDIO: He Kills Me, He Kills Me Not, Mutually Assured Destruction; PROSE: All Flesh is Grass) and his travels with Cass Fermazzi. (AUDIO: Meanwhile, Elsewhere-Previously, Next Time)

Rose Tyler wore a Prussian blue hoodie when she helped the Doctor's eighth and eleventh incarnations deal with a parallel self, D'Pau, and some Sontarans. (COMIC: Empire of the Wolf)

Donna Noble wore a Prussian blue blazer during the 2009 Sontaran invasion of Earth. (TV: The Sontaran Stratagem|The Poison Sky)

Clara Oswald wore Prussian blue jeans during the Good Dalek Incident. (TV: Into the Dalek)

The Thirteenth Doctor wore a Prussian blue crew collar t-shirt with a smeared rainbow pattern during a visit to Kerblam. (TV: Kerblam!)

The Twelfth Doctor wore plaid trousers done in Prussian blue and alabaster when he first meets Ashildr. (TV: The Girl Who Died)

The Fugitive Doctor wore a double-breasted waistcoat of Prussian blue tweed. (TV: Fugitive of the Judoon, The Timeless Children, Once, Upon Time, The Power of the Doctor)