> (2) His use of color is incredible. Some films, especially stalker, are near black and white with incredibly vibrant and poignant uses of green.

Actually the first part of Stalker was (re)shot in black and white because they damaged some part of the original film reel. After about 40 minutes or so into the movie it switches to color.

The tint you're talking about is a technique created by Tarkovsky which alters the film temperature: http://www.imdb.com/title/tt0079944/trivia?ref_=tt_ql_2