Teal

Teal was a colour between green and blue on the visible spectrum.

The Sixth Doctor wore a teal cravat with cream polka dots on basic bow form. (TV: The Twin Dilemma, Attack of the Cybermen, Vengence on Varos, Time and the Rani, The Two Doctors, etc.)

Amy Pond wore a teal trenchcoat during her encounter with Vincent Van Gough. (TV: Vincent and the Doctor)