The easy and traditional thing to do is to go with a white or light blue shirt with a straight or semi-spread collar and patterned tie, and although that's not wrong, per se, you'll stand out if you go with a well-patterned shirt and solid tie, in the correct color combination. It's a striking look that's on the rise as patterned shirts are having a moment. If you're too afraid of the pattern mix or you've already got a suit-on-shirt pattern mix and don't want to tempt anything with a third pattern, it's a go-to that won't let you down.
Of course, you should have an alternative to black in your closet arsenal as well. A mid-brown is going to be the most go-with-everything for your money, but if shoes are your thing, a good oxblood can also serve that purpose. A darker brown is harder to pair with the colors suits tend to come be, but the right shade in the right finish can go a long way if it's not your only pair of dress shoes. The shape principle still applies to these other colors, and I recommend having a trusty black and a brown/oxblood to go with your black, and all your grays and navys. Then if you still don't feel footwear fulfilled, you can go for more adventurous styles, designs and even colors.