SARATOGA SPRINGS — If you’ve been to an Amsterdam High School football game, you’re familiar with the purple-and-gold. If you were at Saratoga Race Course on Sunday, you saw where those colors came from. Two horses in the first race on the card, the Grade I Leo O’Brien steeplechase, carried the purple-and-gold vertical-striped silks of Hurricana Farm, first registered in 1880 when carpetmaking industry king Stephen Sanford started racing Thoroughbreds as part of his pursuit to cure his ulcers.