A smart casual combination of a black sportcoat and dark blue chinos can maintain its relevance in many different circumstances. Show your sartorial prowess with a pair of navy blue suede tassel loafers.
This is another way i can wear the jeans and white shirt with the dark sweater one. Sort of formalize it abit with the shoes and belt combo. Love this casual style - a blazer, denim, crisp white shirt and great shoes.