What are some flowers in these colors?

I'm getting married in a year and I would like some ideas on what kinds of flowers I should go with. I want ones that would be reflective of autumn and stand the cold since we're having an outdoor wedding. I already know I'm going to carry a single strand with two white orchids and a small red velvet ribbon tied around the strand. I will be wearing a antique yellow lack and satin gown with another red velvet ribbon tied at my empire waist line. My maid of honor will be wearing a dark violet gown. I need to find flowers to keep with this theme. So those are my colors: dark red, dark violet, and pale yellow that will be autumn appropriate and beautiful too.