Pink

Pink was a colour.

The Zero Room was pink. (TV: Castrovalva)

Rani Chandra occasionally wore pink. (TV: The Mark of the Beserker, The Temptation of Sarah Jane, The Mad Woman in the Attic, etc.)

Rose Tyler wore a pink t-shirt when she and the Ninth Doctor first meet Slitheen (TV: Aliens of London|World War Three). She also wore a pink dress when she and the Tenth Doctor met the Wire. (TV: The Idiot Lantern)

The Thirteenth Doctor wore a dark pink low collar shirt, (TV: Rosa) and a dark pink crew collar shirt. (TV: The Tsuranga Conundrum)

Sarah Jane Smith wore a pink tank-top when she met the Tenth Doctor. (TV: School Reunion)

Bill Potts wore a pink dress during her visit to the 1814 frost fair (TV: Thin Ice).

Maria Jackson occasisonaly wore pink clothes. (TV: Eye of the Gorgon, etc)

Donna Noble wore a dark pink blouse when she and the Tenth Doctor reach 1920's England. (TV: The Unicorn and the Wasp)

The Happiness Patrol painted the Doctor's TARDIS pink. (TV: The Happiness Patrol)

Kalarians and Ukkans had light pink skin. (PROSE: The Final Sanction, TV: Lost Library of Ukko) Florence Finnegan recalled that the Child Princess of Padrivole Regency 9 had pink cheeks. (TV: Smith and Jones)

In the Mulifane system, pink was the traditional colour of fighting. (AUDIO: Forgotten Lives)

The snow on Nirvana was pink. (AUDIO: World Apart)

The Pink Cichorium was a near-extinct, beautiful, pink plant. The very last of its kind was tended daily by Irene, a botanist who lived alone on the mini-moon of Delphi. (COMIC: Borrowed Time)

Vaagon had a pink sun. Bubbleshake was pink, and came in pink cans. (PROSE: The Highest Science)

Raoul's partner imagined that "lesbian novelist" Iris "[lay] under a pink bedspread, like Barbara Cartland in Camden Town, a poodle either side and a typewriter on her lap". (PROSE: Hospitality)