Actually Paul, Mac is correct here. The 1957 20th Century-Fox production of "Desk Set" starring Tracy and Hepburn was filmed in and released to the theaters(or "theatres" in YOUR neck of the woods) in "Color by De Luxe"...which was a less costly color film process than the more vivid "Technicolor" of the time. And, because of this "less-vividness" of the "Color by De Luxe" process and film stock, THIS is probably what has given you the impression that this film had been colorized.
Note the fine-print at the bottom of this film's movie poster here...
(...and btw, ALSO notice if you will the COMPLETE lack of ANY "superfluous 'u's" in my reply to you OR within said fine-print text of the above shown movie poster here!!!)
