the color of the trichomes, is what gives the hash it's color, same with oil.......clear oil is made by harvesting early plants when the trichomes are clear, the later you harvest the darker amber the trichomes become, if you harvest very late the hash or oil will be very dark, hash will even be almost black......harvesting when half the trichomes are milky and half are amber will make a blond hash or honey oil.....