Tartan

Liz with Dr O'Kane's blanket behind her. (HOMEVID: The Zero Imperative)

Tartan was a type of pattern.

The Sixth Doctor's coat featured patches of red tartan, red, green, pink and maroon felt, peach wool, a woven back piece, checked collar and yellow and pink lapels. (TV: The Twin Dilemma)

Jeremiah O'Kane owned a tartan blanket. (HOMEVID: The Zero Imperative)