Mustard (colour)
Mustard was a shade of yellow.
The Eighth Doctor wore a single-breasted waistcoat of mustard velvet. (COMIC: The Pictures of Josephine Day)
The War Doctor wore a double-breast waistcoat of mustard moleskin when working with Alice Obiefune and the Child Master. (COMIC: First Rule, The Organ Grinder, Kill God, Fast Asleep)
The Thirteenth Doctor wore mustard braces to hold up her trousers. (TV: The Woman Who Fell to Earth, COMIC: The Many Lives of Doctor Who, et al.)
Amy Pond once wore a mustard yellow blouse with white polka dots. (TV: The Power of Three)
Rose Tyler once wore a mustard t-shirt under her blue denim jacket. (TV: Fear Her)
Clara Oswald wore mustard yellow jumpers; one with a black collar (TV: The Time of the Doctor) and one with a polo collar. (TV: Under the Lake|Before the Flood)
Peri Brown wore a mustard blouse under her blazer. (TV: The Mysterious Planet)
The War Master wore a single-breasted waistcoat of mustard moleskin with his olive green tweed jacket. (AUDIO: Killing Time)
The Doctor who posed as Merlin wore a mustard waistcoat under his afghan coat. (PROSE: Good Companions, Revenants)
