Colour coding scenes in movies is a fairly commonplace practice - perhaps one of the most notable examples is Steven Soderbergh's Traffic, which switched colours throughout the film depending on the characters and setting it was focusing on. The Matrix is no different - the Wachowskis coded the Matrix itself as green, with the real world represented by blue tones. But The Matrix takes subtle colour and design schemes a little further - throughout the movies, grids and grid-like patterns can be seen frequently in the scenes set in the Matrix - production designer Owen Patterson said, "the contemporary part of the Matrix has been laid out in grids, and you notice in things like the interrogation room or the government office that there are grids on the walls, theres grids on the floor, theres even grids in the ceiling." He expands, describing how these grids were intended to "convey a feeling of artificial control." Sometimes it's the subtle details which make a film that little bit better.
