Alexa Chung was spotted on the streets of NYC looking prim and proper in a brown and blue ensemble that screamed Fall chic. She tucked a blue silk button-down blouse into a brown suede miniskirt, then finished off with black opaque tights, Marc by Marc Jacobs mouse flats, exaggerated tortoiseshell cat-eye sunglasses, and a floral bag. When the weather cools, re-create Alexa's look by pairing a blue blouse with a brown skirt or a blue sweater with brown pants. You can also sport a brown top with blue bottoms to switch things up.