This ensemble with a trenchcoat and a navy midi skirt isn't a hard one to pull off and easy to adapt. If you're clueless about how to round off, add a pair of dark green pumps to your outfit.
Dark Green Pumps with Trenchcoat Warm Weather Outfits In Their 30s
For something more on the casual and cool end, try this pairing of a trenchcoat and navy skinny jeans. For extra fashion points, add a pair of dark green pumps to the equation.