yeah i dont think the color of the rack has much to do with the age of the deer..my dad shot a really old deer this year bout 4 and a half years old..whiter than snow rack...i shot a smaller 5x5 this year about 2 2 and half years old this year and had a really really dark chocolately colored rack..i think it has more to do with the surroundings the bucks are in as to what color there antlers are..like i agree with greg h..whatever trees they rub on give them that color of rack..if you want to know the age of your deer id take a look at the teeth..i think thats the most accurate..