Purple
From Tardis Wiki, the free Doctor Who reference
Eggplant, a dark shade of purple, was used in clothing by several incarnations of the Doctor and their companions.
The War Doctor wore an eggplant purple scarf. (COMIC: The Lost Dimension)
The Eighth Doctor wore an ascot tie of eggplant dupioni. (COMIC: A Matter of Life and Death)
Martha wore a dress of eggplant taffeta. (TV: The Lazarus Experiment)
Donna wore an eggplant sweater when she corrected the paradox. (TV: Turn Left)
