How does Andrew Niccol encode his ideas in the visual language of his film, Gattaca?

In the film Gattaca, Andrew Niccol is able to use visual language efficiently and subtle enough to leave the audience noticing small details that represent something bigger than they seem. The biggest and most noticeable is the obvious modernism society: the simple and straightforward but still elegant buildings, the double breasted suits, the absence of colour is most scenes. Everything the film shows points to this idea of modernism. And we know that he meant to do all this as Niccol was the actual screenwriter for this movie and came up with all the ideas for it.