J.A.R.Vision
When the MCU first invited Paul Bettany, he didn’t know that he’d have a bigger role in the universe later on. He was recruited to voice J.A.R.V.I.S, and the only guidelines Paul received about the A.I. system was that it was a robot without a personality. Even though we never got to see Paul in Iron Man 3, there was a reference to his upcoming role as Vision.
When Tony, Pepper, and Maya are chilling in Tony’s living room in Iron Man 3, there’s a red-and-green stocking in the background with J.A.R.V.I.S. written on it, which has more to do with Christmas than Vision’s color scheme. As for the design on the stocking, it’s actually binary that reads “Merry Christmas.”