what strain is it? Has it been sprayed with anything? has there been a lot of heat?
Orange hairs usually mean nothing-- many strains have orange hairs well before harvest.. and sprays, heat, stress etc... can cause them to turn too...
just watch the # of actual flowering days according to the strains needs, and start checking the trichome crystals a few days ahead of time.... them emergency flush em!
Emergency Flush for Harvestemergency-flushing-for-harvest-t21899.html
Harvesting, drying & curingharvesting-drying-curing-101-t29259.html