Blackberry leaves in fall.     Ochre, crimson, merlot, claret, honey-brown, and cinnamon-orange are the island’s colors of autumn. New England – even southern New England – is known for its dramatic fall foliage colors. The mainland hardwood forests burst into flames of color: the reds, yellows, and everything in between, seem to glow and radiate color from within. Leaf-peeping excursions are standard fall activities throughout New England.     On Block Island, September an