Basic Black Is Good
If all you have in your wardrobe for footwear is brown shoes (sandals, loafers, etc.), you're wrong.
Go out now - run, don't walk - and get yourself a cheap pair (if that's all you can afford) of something non-brown that you can put on your feet outside your socks (if you wear socks).
Brown shoes should only be worn once, maybe twice, a year. And then only when you've got no other choices.
Though why you'd have no other choices is beyond me.
Black shoes are like blue jeans, they go with everything.
Brown shoes are like...like nothing else.
If you're going to wear brown shoes, you need to have the rest of your outfit match the same shade, tint, hue as your shoes. Do you realize how difficult - nay, impossible - that is?
It would be better to wear white before Memorial Day or after Labor Day than to wear brown, especially on Don't Wear Brown Shoes Day, but pretty much any day.