Look, metallics have been in for a while, and let's be real: They're probably here to stay. And why shouldn't they be? They're glittery yet sophisticated, and they bring you that much closer to making your nails into your most luxurious accessory. Still, while silvers and golds have enjoyed a lot of time in the spotlight, it's time to turn your attention to copper. It's got a satisfyingly warm gleam to it, and it's a little unexpected, which gives it a little extra boost of trendiness.