Whenever Mary Stone is at her century-old home on the peninsula of Old Black Point, she feels blue. But for her, feeling blue has a different meaning. “I love old blue paint, I love indigo, I love any shade of blue that reminds me of the water,” she says. From virtually every room of her house, the wide expanse of Long Island Sound, often complemented in the summer with a blue sky, is in full view. So, when Stone and her family—which includes her husband and three 20-something children-—are there, they are happy.