My all time favorite look is white on white or basically anything monochromatic. It gives such a clean and put together look. It can be different shades of white and it will still go well. Be sure not to eat anything that has red sauce or messy because you are bound to spill something when you are wearing white.
Coat: Vintage (available at The Bargain District)
Top: Halston Heritage (available at The Bargain District)
Skirt: L’oro di Seta
Shoes: Chelsea Paris
Clutch: YSL Belle du Jour