What's black, white, and chic all over? You! And, The City's Olivia Palermo, Kim Kardashian, and Hilary Duff. I know I'm inspired after seeing these streamlined getups in Coco's favorite colors. When all else fails, black and white always seems right. It may be trendy, but it's also classic. Notice how all three are wearing bright nail polish to pack a little punch.