"It had been so easy once upon a time, we mused. If you were a good accountant or lawyer, or worked in sales or almost any other non-blue-collar office job, you put on your dark business suit, white shirt, discreet tie, black oxfords and went to work. It was all rather simple and time-saving and free of nagging choices. You might have incorporated a few personal touches like a pocket square or fancy wristwatch. But you didn't have to worry about whether to wear the tangerine-colored cashmere turtleneck with the fawn suede blouson or the cappuccino-colored, waxed cotton shooting jacket with the puce narrow-wale cords (choices for which there seemed to be no authoritative guidance). As long as things fitted decently and weren’t garish, you were safe. More than a few men have told me they no longer understand what's appropriate for any occasion anymore, except maybe weight-training."
G. Bruce Boyer at First Things discusses men's clothing.