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.
Cheat sheet: what color shoes go with what color suits. These are guidelines. If you want to make a fashion statement, a light or dark brown pair of shoes would go great with a navy, blue, or light grey suit.
The Ultimate Gentleman Cheat Sheet Every Man Needs