"In a scene where Olivier has tracked down Julie but is then ignored by her, there is a close-up of Julie allowing a sugar cube to soak up her coffee. Deeming that the sugar cube had to soak up the coffee in precisely 5 seconds, Krzysztof Kieslowski had his assistant director test multiple brands (which soaked with coffee anywhere from 3 to 11 seconds) to find one that took just the correct time. "

Három szín: Kék, iMDB trivia