They call this set the Rock & Romance set which I find appropriate with the mix of darker colors and lighter more subtle colors. The four shades are: Chrome Passion (dark charcoal holographic), Heat of the Night (blackened red), Midnight Rendezvous (shimmery navy), and True Romance (mettalically nude taupe).
The set really is lovely and a pretty great value. The polishes retail for $10 each usually. If you can get over the tiny size (I will probably never use them up but some might) then I would grab this set before it's gone for good. It is limited edition after all.