All budsights are that purplish color and it’s bagseed so idk the strainif its only at the buds near the top and not ones in shade could be a copper deficiency as well, what strain is she?
is your water ph'd? if all the buds are purple then its most likely just the strain.I feed her about once a week advance nutes grow micro bloom, and do regular watering about 2-3 time a week.