Pink

Pink was a colour.

The Zero Room was pink. (TV: Castrovalva)

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)

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