Navy was a dark shade of blue used in clothing. (PROSE: Exodus Code)
The Eighth Doctor occasionally wore a navy frockcoat with peaked lapels. (COMIC: Dreadnought) He also wore a double-breasted peacoat of navy leather with peaked lapels. (AUDIO: The Great War, Lost Property, Day of the Master)
The First Doctor wore a navy ribbon bow tie; most notably during his first adventure with Barbara Wright and Ian Chesterton during the Stone Age, (TV: The Unearthly Child) his alliance with Thals to defeat Skaro City Daleks in his first Dalek encounter on Skaro, (TV: The Daleks) during his encounter with Marco Polo and Kublai Khan on 1289, (TV: Marco Polo) during his first encounter with Voord, (TV: The Keys of Marinus) during his time with Aztecs, (TV: The Aztecs) during his first encounter with Sensorites, (TV: The Sensorites) during the French Revolution, (TV: The Reign of Terror) when confronting the Inventor Master on Destination, (AUDIO: The Destination Wars) when confronting Takagi Mamoru and Casper Knox in Japan during the 1820s, (AUDIO: The Barbarians and the Samurai) during his first encounter with a Dalek Supreme, (AUDIO: Return to Skaro) during the First Omega Crisis, (TV: The Three Doctors) when preventing Mark Forester's mad plan with DN6 from endangering life, (TV: Planet of Giants) and when helping the Rebels of London foil Dalek Earthforce's Project Degravitate and saying goodbye to Susan Foreman. (TV: The Dalek Invasion of Earth)
The Third Doctor wore a smoking jacket of navy velvet with a shawl collar when he first met the Silurians during the Wenley Moor Affair, (TV: Doctor Who and the Silurians) when foiling General George Carrington's plan to frame alien ambassadors to justify war, (TV: The Ambassadors of Death) and when going to a parallel world and stopping Eric Stahlman's Inferno Project from destroying Earth. (TV: Inferno)
The Seventh Doctor tried on a Napoleonic frock coat in navy and ivory with gold epaulettes and a crimson trim before eventually going for a silver grey safari jacket. (TV: Time and the Rani) He also wore one navy blue sock. (PROSE: Return of the Living Dad)
The Ninth Doctor wore a navy jumper when he and Rose Tyler met Charles Dickens and the Gelth. (TV: The Unquiet Dead) He was also photographed wearing a navy blue polo-neck jumper at the Assassination of John F. Kennedy. (TV: Rose)
The Tenth Doctor wore navy blue ties. He wore one with burgundy circles in a diagonal grid during his trip to Krop Tor, (TV: The Impossible Planet|The Satan Pit) and before and after dealing with the Family of Blood. (TV: Human Nature|The Family Of Blood) He also wore one with a crimson flora random design during the Human Dalek Incident, (TV: Daleks in Manhattan/Evolution of the Daleks) before meeting Richard Lazarus, (TV: The Lazarus Experiment) after the Toclafane Invasion of Earth, (TV: Last of the Time Lords) when meeting his fifth incarnation, (TV: Time Crash) when going on board the Titanic, (TV: Voyage of the Damned) when meeting Agatha Christie, (TV: The Unicorn And The Wasp), when meeting River Song and some Vashta Nerada, (TV: Silence In The Library|Forest Of The Dead) and during a trip to Bowie Base One on Mars in the 2050s. (TV: The Waters Of Mars) He also wore one in brown with raised diagonal stripes of navy and light blue during the March of the Adipose. (TV: Partners in Crime) and when he joins forces with Jackson Lake and Rosita Farisi to foil Cybus Cybermen during the 1851 Incident. (TV: The Next Doctor) He also wore a navy shirt when he met Professor Yana, a human form of the War Master, and Chantho; (TV: Utopia) and also a navy undershirt when he met the Midnight entity. (TV: Midnight)
The Eleventh Doctor wore a navy bow tie when he witnessed the birth of the New Dalek Paradigm during the Ironside Incident. (TV: Victory of the Daleks)
The Twelfth Doctor wore a navy blue cardigan with a matching covert coat; (TV: Deep Breath. etc.) most notably during the Good Dalek Incident, (TV: Into the Dalek) and when he met Robin Hood. (TV: Robot of Sherwood) He also wore a navy top hat during his visit to the 1814 frost fair. (TV: Thin Ice)
The Fourteenth Doctor wore a double-breasted overcoat of navy blue tweed with peaked lapels. (TV: The Power of the Doctor-The Giggle)
Allison Williams wore an alabaster scarf with crimson and navy stripes when she helped the Seventh Doctor during the Hand of Omega Incident, (TV: Remembrance of the Daleks)
Sarah Jane Smith wore a navy top during her 'final' farewell with the Tenth Doctor. (TV: School Reunion) She also wore a navy velvet blazer when she met Mona Lisa. (TV: Mona Lisa's Revenge)
Maria Jackson sometimes wore navy denim jackets. (TV: Eye of the Gorgon, The Warriors of Kudlak, Whatever Happened to Sarah Jane?, The Last Sontaran)
Amy Pond wore navy blazers with notched lapels over t-shirts. (TV: Amy's Choice, The Lodger)
Clara Oswald wore a navy blazer with notched lapels over a midnight blue dress when meeting Professor Alec Palmer and his assistant Emma Grayling on Caliburn House during 1974, (TV: Hide) and also a crimson and navy tartan shirt when posing as a Doctor. (TV: Flatline) Clara Oswin, her Victorian incarnation, wore a navy bustle dress. (TV: The Snowmen)
Yasmin Khan wore a navy walking suit with a white blouse during her encounter with Nikola Tesla. (TV: Nikola Tesla's Night of Terror)
Ace wore a white blouse with navy stripes. (TV: Remembrance of the Daleks, The Happiness Patrol, The Greatest Show in the Galaxy, Dimensions in Time)
On her visit to Messaline, Donna Noble wore a navy blouse with buttons. (TV: The Poison Sky, The Doctor's Daughter)
Rosita Farisi wore a walking skirt in navy, scarlet, and sapphire with amber and maroon diamonds when she helped the Tenth Doctor and Jackson Lake defeat Cybus Cybermen during the 1851 Incident. (TV: The Next Doctor).
The Sixth Doctor wore a navy waistcoat when he and Evelyn Smythe met Cybermen on Chronos during 3286. (WC: Real Time)
Toshiko Sato wore a navy pencil skirt. (TV: Out of Time)
Sally Sparrow wore a navy sweater vest when she met Weeping Angels. (TV: Blink)
Dan Lewis wore a navy blue blazer during the early 1900s, the 2021 Sontaran Invasion of Earth, and the Flux. (TV: Survivors of the Flux|The Vanquishers)
Bill Potts wore a navy peacoat over her midnight blue overalls. (TV: The Lie of the Land)
A parallel version of the Doctor wore a navy jumper. (AUDIO: The Emporium at the End)
The Curator, a future version of the Doctor, wore an ascot tie of navy and crimson paisley under his tattersall shirt's collar when taking the form of an older Fourth Doctor. (TV: The Day of the Doctor)
The Master's Tremas incarnation wore a navy shirt with an ivory collar during his Survival Stratagem. (TV: Survival) He also wore a single-breasted waistcoat of navy moleskin with orange plaid symbols during his spy incarnation. (TV: Spyfall, Ascension of the Cybermen|The Timeless Children)
Brigadier Alistair Gordon Lethbridge-Stewart wore a blazer, waistcoat and trousers in navy when braving the Game of Rassilon set up by President Borusa in his quest for immortality. (TV: The Five Doctors)
Many Sontarans wore steel blue space armour with navy helmets and pauldrons. (TV: The Sontaran Stratagem/The Poison Sky, The Last Sontaran, The End of Time, The Pandorica Opens, A Good Man Goes to War, The Crimson Horror, The Time of the Doctor; AUDIO: The Sontaran Ordeal, The Eternity Cage, The Great Sontaran War, The Sontaran Project; COMIC: Fugitive, When Worlds Collide, The Instruments of War, Supremacy of the Cybermen; GAME: The Gunpowder Plot, The Doctor and the Dalek)
Kurt wore navy overalls when he met Sontarans including Commander Steg and Lieutenant Vorn. (HOMEVID: Shakedown: Return of the Sontarans)
Kate Stewart wore a navy blue blazer and trousers during the 2021 Sontaran invasion of Earth and the Flux. (TV: Survivors of the Flux|The Vanquishers)
The Editor of Satellite Five wore a navy blazer and trousers. (TV: The Long Game)
Vienna Salvatori wore leather trenchcoats done in navy during the 2223 Dalek invasion of Earth. (AUDIO: The Shadow Heart-Vengeance)
Albert Dumfries, a senior member of the Cabinet of Harold Saxon, wore a crimson tie with navy stripes up to when he was killed by the Saxon Master before the Toclafane Invasion of Earth. (TV: The Sound of Drums)
Robert Muir wore a navy blue justacorps as part of his Georgian costume when going to a party in Cranleigh Hall during 1925. (TV: Black Orchid)
The Dream Lord wore a navy tie when he mentions about the consequences of the Eleventh Doctor, Amy Pond and Rory Williams dying on the dream and the real world. (TV: Amy's Choice)
A parallel version of the Doctor wore a navy tie with white polka dots when he and Bernice Summerfield fought Faction Cybermen on Nazi Germany. (AUDIO: Blood and Steel)
Doctor Olivia Steele wore a navy pencil skirt. (PROSE: Exodus Code)