I got the Key Largo Ebony, which has black threads but also some deep dark grey threads to provide some texture. It looks great; I think they just discontinued that color, however. It's the perfect length for my room and the perfect depth for both sitting and napping.
My only concern is that I'm often afraid I'm going to snap one of the buttons; hasn't happened yet but on a few occasions my clothes have caught one and tugged. This is the worry with any tufted sofa, I suppose.
Another big thumbs up for the customer service. I needed the couch in time for my holiday/housewarming party, and they worked with me to make it happen. When the UPS guy showed up, he commented that he'd never seen a couch so expertly wrapped. No damage. Just unwrap, screw the legs on and lounge.