The unusual kit colour, officially described as ‘taupe haze’, hardly dazzled under the Craven Cottage lights, and some fans suggested Tottenham players struggled to locate each other.
Put to him after the game that the kit had played a part in the result, Postecoglou was not convinced.
“I don’t know is the real answer to that genuine question. That’s my genuine answer. I’m not really sure. I don’t think it would have played a massive part.
“We need to find out about our players, find out about the group, the character and the personality and, I dunno, maybe we need to check out our colour matching capabilities.
“Cappuccino was it? Nice.”
It is not the first time a kit colour has been linked to a poor performance. Manchester United famously switched kits at halftime against Southampton in 1996 after manager Alex Ferguson blamed their grey shirts for a poor display.
(Reporting by Martyn Herman, editing by Pritha Sarkar)