Any shade of green, from hunter to olive to emerald would look good. 2 great planters or topiaries would complete it!

How about a cinnamon/nutmeg color?

How about a very dark red...like Ben Moore "Country Redwood"

Something in a darker blue color would be super sharp. You could also do a teal and add some white to make it pop. If you wanted something a bit elegant, you could do a shade of purple as well... These are all more unique colors for a front door, but dare to be different! Hope this helps. Good luck!