Socks!

I was reading an article yesterday that listed the attributes that, when you're traveling in a foreign country, broadcast to the natives that you're an American, and one of the items listed is "wearing white socks". Now, you have to understand, I have no fashion sense no matter what country I'm in, including my own, so I have no idea and I have to ask: what color socks are you supposed to wear?

Please enlighten me, so that I can endeavor to not be so damned American when I'm traveling abroad. There's nothing I can do about my accent, but I can certainly try to make my footwear fit in.