it looks like a natural wood color. i like it that way. or you could choose a rust color to coordinate with the bricks.

Same color as shutters or a much deeper brown/black stain.

Deep plumb or burgundy

Looking again, I think your door with the leaded glass appears to be a bit too formal for the style of your farmhouse. Have you considered something a little more in keeping with the home? Would also suggest removal of the clumpy shrubs in favor of azaleas or hydrangeas.

Schlage Wakefield Style Handleset in Polished Nickel · More Info

Just watched Joanna & Chip Gaines work over a farmhouse much like yours with the big porch. I'll try to find the episode # for you (HGTV _ Fixer Upper.)

Thanks, please let me know the episode# once you find out. Thank you once again for the wonderful advice.

Burgundy would be beautiful.

I would go with a dark red...something like SW Rustic Red.

http://magnoliahomes.net/fixer-upper/fixer-upper-episode-ten/ HERE IS IS!

This is the porch and doors I can see on your home.

Red was the first colour that came to mind. It would be great!

how about smokey teal? totally different, yet not in your face like some.

I would suggest you paint the door white and then paint the recessed panels the same color as the shutters. You might add plantation shutters to flank the door and also have white or black sconces that flank the door shutters. Your home is a very lovely design!