Neither. I match the watch case; all of my watch bands are dark, to match the space gray watch. I have the black sports band that it came with, a black woven nylon, and the space black Milanese loop. I'm thinking of getting a leather band, and I'll let you guess the color. I more match the style of band to how well dressed I am (casual: nylon or sport; Milanese when I am well dressed), and occasionally I wear a mechanical watch on my left wrist and the Apple watch on my right. All of my mechanicals have bracelets, so I wear the Milanese or the Nylon when that happens.