I was at a thrift store over the weekend, and found a grey wool vest that appears to be orphaned from a suit. The shade of grey doesn't match anything I own, but at $4, I went ahead a bought it. Now I'm wondering how to wear it. My instict says that I shouldn't wear it with one of my grey suits. Perhaps with a navy suit? With charcol pants, a black blazer, white shirt and silver/white striped tie? Any suggestions?