Phones are phones, I usually just get whatever they have. I've had phones of all different colors over the years. Some of my flip phones were the same yellow as the lines on the road. Didn't matter, it made phone calls.
My iPhone's have all been black / space grey / whatever you want to call it. Which works fine. But, it's honestly whatever they handed me. Black is fine, because it just blends in if I happen to pull it out around other people. Nobody notices what it is, or cares.