Trying to decide between peridot and choc brown dresses for my bridesmaids for an October wedding, any advice?

You could use both colors...have your bridesmaids in the peridot and the moh in the chocolate or vice versa. My MOH's dress was a little different then the bridesmaids. I wanted to stand out a little from them. Sounds like a wonderful choice of colors. Your wedding is going to be beautiful.