This is a Sunday brunch with the guys or family outfit! I feel like you don't have to wear dress pant to wear a blazer with a dress shirt. Just throw on some plain, simple jeans and add on that beige blazer with a neutral color dress shirt.
Wear a white dress shirt and navy dress pants for a sharp classy look. Show your sartorial prowess with a pair of dark brown leather oxford shoes. — White Dress Shirt — Burgundy V-neck Sweater — Navy Dress Pants — Dark Brown Leather Oxford Shoes