Which color boot to wear with black and khaki?

Hey guys. I've narrowed down my search for boots to the Dayton Service boots, but I'm not sure which color to get.

I only got two pairs of pants. Black jeans and khaki chinos. Which color boot would go best with both of these? And I'm almost never in a formal setting, so that wouldn't be a problem.

http://www.daytonboots.com/products/service-boot?variant=513809213

Appreciate any help!