An olive double breasted blazer and beige chinos are the kind of effortlessly smart items that you can wear a hundred of ways. White athletic shoes will add a hint of stylish effortlessness to an otherwise standard look. This getup is most probably exactly what you've been looking for as a gent over 50.
Beige Chinos with White Athletic Shoes Smart Casual Outfits After 50
For something on the classic and casual end, consider this pairing of a dark brown trenchcoat and beige chinos. You could follow a more casual route with shoes with a pair of white athletic shoes. Now that's how you do semi-casual as a gent in his fifties.