This is one of my favorite look to wear. It is really simple and very sophisticated. You can wear this look in the office or a dinner party. You really cannot go wrong with this look. I start this look with a grey/purple plaid shirt just to give it a pop of color. Then, I paired it with a solid color sweater that match with one of the color on the plaid so there won't be any color clashes. I leave a few of the button of the shirt unbutton to give it more of a casual look than formal. If you do want to go formal with this look, you can top it with a tie and tuck in the shirt and put on a blazer. Last but not least, footwear. I like to wear this look with loafers because it gives off an expensive look. The loafer really put this look together and gives off a causal look.