i bought new outterwear last year and being well aware of how deer see the world through their eyes have resolved that my camo serves 3 purposes.
in order of importance to me:
1. scent profile - the locals in the towns around the parts that i hunt scoff at me for wearing "fancy camo" being the work shirts and blue jeans they wear work just fine. true, but 9 out of 10 of them hunt primarily from a truck whereas i am walking or shooting from a blind or stand while playing the wind. my hunting gear is just that, hunting gear. i don't don it until i am leaving my vehicle to hit the field and it comes off when i am leaving the field. i laugh every time i'm at cabelas and i see guys wearing camo around the store that they don't think twice about using when they hunt too.
2. insulation - slowly but surely i buy clothes to hunt exclusively in and don't ever wear "street clothes" underneath my gear and concentrate on buying good materials that won't make waiting on an animal a soggy wet, shivering chore.
3. break up - while it has merit i don't rely on my camo to make me invisible but a little extra doesn't hurt.
bottom line, hiding from the animals nose and being quiet should be every hunters main concern when hunting deer.