Violet

Violet was a colour, situated on one end of the visible spectrum before indigo and blue. (TV: Sky)

The Eighth Doctor wore a violet waistcoat. (COMIC: Dreadnaught)

Raxacoricovarlonpatorians had violet skin. (COMIC: Doctormania)

The Maelstrom was partially violet. (PROSE: Enter Wildthyme)

Missy wore a walking suit and walking skirt in violet. (TV: The Magician's Apprenctice, The Witch's Familiar)