Simple, sort of neutral nails. The base colour used for these is "Gouda Gouda Two Shoes" by OPI, it's from their Holland Collection. I bought this along with "Wooden Shoe Like to Know" and they are currently the only OPI nail polishes in my collection. On top of that I stamped an image from BM plate BM-11 in Color Club's Nail Art Polish in "Bronze" which looks more like a yellowy gold(in my opinion).
I realize that the design is hard to see, but none of the photos I took seemed to capture a whole lot of it.