It was green and is now a purple-brown. I love it. The leaves you sent were crumbled, but I believe you have a sweet potato vine, Ipomoea batatas, a trailer related to the morning glory. These fast-growing ground covers or vines are treated as ornamentals, not as edibles. They also are treated as annuals, so you might want to take some cuttings so you'll have starts next spring.
Blue plumbago pops through the purple foliage and makes a nice contrast.
These sweet potato vines work in large hanging baskets, too. Sun or partial sun and water are about the only real needs. I have a garden spot with yellow daffodils. It sprouts beautiful foliage year after year, but for the last two years it has had no blooms. The usual cue is diminishing blooms.