Marrying a navy blazer and khaki linen dress pants will be undeniable proof of your outfit coordination expertise. The whole ensemble comes together quite nicely if you complement this outfit with a pair of tan leather loafers. When it comes to dressing for autumn, nothing beats a cool getup that transitions easily between seasons. In your thirties, you probably want to start dressing with more refinement. In this case, combos like this become very relevant.