Emerald (colour)
Emerald was a shade of green called after a certain gemstone.
Ace wore an emerald t-shirt under a black cardigan when she and the Seventh Doctor worked with UNIT to stop Morgana and the Destroyer. (TV: Battlefield)
Amy Pond wore an emerald t-shirt under her navy blazer. (TV: The Lodger)
Bill Potts wore an emerald velvet coat during a visit to the 1814 frost fair. (TV: Thin Ice)
The Eighth Doctor wore a cravat of emerald dupioni when he, Charley Pollard, and C'rizz confront the Kro'ka. (AUDIO: Caerdroia)
The Third Doctor wore a blazer of emerald velvet when he and Sarah Jane Smith helped to save Peladon from Ice Lord Commander Azaxyr and Eckersley. (TV: The Monster of Peladon)
After his clothes were ruined by a Xaranti, (PROSE: Deep Blue) the Fifth Doctor wore a white shirt with an emerald lining. (TV: The Awakening-The Caves of Androzani) His successor, the Sixth Doctor, wore it during his first hours; (TV: The Caves of Androzani) before changing for a white one with a cherry lining. (TV: The Twin Dilemma)
Jo Jones wore an emerald and ivory scarf with rust orange symbols when she reunited with Clyde Langer on the Memory TARDIS. (TV: The Three Doctors)
Bliss wore an emerald jumper. (AUDIO: The Famished Lands)
Rose Noble wore an emerald green jumper when she met the Fourteenth Doctor, Beep the Meep, and some Wrarth Warriors. (TV: The Star Beast)
The sixth incarnation of the Corsair wore emerald breeches. (COMIC: Old Friends)
The Reborn Master wore an emerald cravat when posing as 'the other Doctor'. (AUDIO: Dominion)