As with shorts, its hard to beat plain black tires. I do like the retro tan Vittoria Corsas on some of my steel bikes. If you hit it right, a colored sidewall looks really nice. If it doesn't quite match, it looks awful. Same with bar tape.
Do you need a premium membership to post pics here?
You're right about that, but black is blah to me. Whatever tire I choose will hopefully be found on Amazon for easy returnability if I don't like them.
You need 10 posts before you can attach a pic. I found a few threads to post on but then ran into a 5 posts per day limit. So i had to wait a few extra days. LoL