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.
I dont normally like these jackets but this one looks good. Every business man needs a definitive sports jacket. Checkered blue jacket with a small yet eye-catching lapel pin (in maroon, no less) works wonder with in an otherwise plain blue/grey ensemble.
Not all jackets are created equal: the difference between a blazer, a suit jacket, and a sport coat.
Consider pairing a grey plaid blazer jacket with navy blue trousers for a sharp, fashionable — Navy and White Print Pocket Square — White Longsleeve Shirt — Grey Plaid Blazer — Black Leather Belt — Navy Dress Pants