Orange

Orange is especially important in The Godfather. Not only is it the primary colour in most indoor scenes, the physical fruit is also an important part of the film. The following website records all the uses of orange in the films http://www.jgeoff.com/godfather/oranges.html.

Examples:

• Right before he was shot, Don Corleone bought 2 oranges
• When sitting with his father after he returns home from the hospital, Fredo sits next to a fruit basket of oranges. He later betrays the Family
• Kay wears an orange coat when she comes looking for Michael at the compound.
• Carlo gets beaten by Sonny, while wearing an orange suit

Notice the oranges at the table. Opposite Duvall is a man who, by refusing the Godfather, suffers.

Carlo wears an orange suit before being beaten up. Notice also that the hue of the entire image is orange, adding to the period look of the film. 

The Don who goes onto die sits in front of an orange. This foreshadowing is prominent throughout the film.