Deer can see shades of blue, as was stated in an earlier post....and no, they can't see blaze orange. Many years and stare-downs both on the ground and in the tree while wearing blaze orange has taught me that. They can CERTAINLY smell you and pick up on movement, though! Like Liv said, play the wind.
On a side note....go and get your hands on some good hunting magazines. Deer and Deer Hunting is the best one out there. It is not your "big buck" magazine, but deals with biology, ecology and hunting lore as well....and that's why I love it. You will learn a ton from it.....