Ivory (colour)
Ivory was a shade of white named after a substance which forms the tusks of some animals.
The War Doctor wore a herringbone scarf done in burgundy and ivory up to his death. (TV: The Night of the Doctor, The Day of the Doctor)
Sarah Jane Smith wore an ivory lace dress when she and the Fourth Doctor met Sutekh. (TV: Pyramids of Mars)
The Third Doctor wore an ivory bow tie. (COMIC: The Lost Dimension)
Emily Morris wore an ivory cravat with black marks when she met Sarah Jane Smith. (TV: Lost in Time)
Missy wore an ivory blouse with her walking suit. (TV: Deep Breath, etc.)
The Seventh Doctor wore an ivory safari jacket. (TV: Time and the Rani, Remembrance of the Daleks, Silver Nemesis, etc.)
Bill Potts wore an ivory cravat when visiting the 1814 frost fair. (TV: Thin Ice)
Diane Holmes wore an ivory shirt when she landed on 21st century Cardiff. (TV: Out of Time)