i disagree w/ caliorburst ,
ignore color of hairs . go to radio shack n buy a 30x or 100 x pocket microscope n look at tricomes col,or , not hair color . at 100x trics look like a golfball on a golf tee . when 50% of trics are milky and 50% amber it's time to harvest . don't be misled by hairs color .
peace n enjoy all your hard work .