I went with copper, because I love the warm/cool contrast, and chose a little of this and that to go with my beads and my butterfly--a cultured sea glass nugget from Stinky Dog Beads in cornflower blue, a spotted, etched lampwork spacer in a similar shade (it worked great as part of my bail!) from Julie Miller Glass, blue kyanite ovals from Lima Beads, recycled glass tulips in vivid yellow from Afrobeadia, seed beads from here and there, and tiny copper torpedo beads from Monsterslayer.
Beadsmith hole punch pliers. I added a simple second strand of delicate copper chain, with another kyanite oval.
(I don't mean to brag, but the blue in that butterfly is the color of the clear skies up here in Montana--shocking, nearly cobalt blue overhead when you're out hiking.)
I don't usually use these colors--bright blue or bright yellow--but it was fun!