In a medium bowl, combine sweet relish, mayonnaise, and crabmeat. Set aside.
On a 12-inch chilled platter, combine the 2 types of lettuce in the center of the platter. Arrange tomato wedges around the perimeter of platter. Alternate the olives, bell pepper rings, and cucumber slices between the tomatoes. Arrange the hard boiled eggs around the vegetables. Spoon the crabmeat mixture into the center.