Wedding- Wedding aisle decorations: pretty leaves or flower petals sprinkled along sides. If you do this you really don't need a runner. And the color is up to you, but soft peach fall colors shown here.
Image detail for -autumn-leaves-wedding-centerpiece. Even though this is a wedding centerpiece, I like it for a Rall centerpiece or Thanksgiving. It is inexpensive. Most people have a hurricane and leaves right outside their door.