A white dress shirt looks especially polished when worn with red dress pants in a modern man's combination. Black leather oxford shoes are a great option to complement this ensemble. So take cues and be the sharpest dressed gent your age.
White Dress Shirt with Black Leather Oxford Shoes Warm Weather Outfits In Their 30s
To look like a modern dandy at all times, choose a white dress shirt and black and white polka dot dress pants. If not sure about the footwear, go with a pair of black leather oxford shoes. As a 30-something gent, you want to start dressing with more refinement. That's when combinations like this are a fail-safe option.