If you take your style seriously, go for smart style in a navy shirt jacket and dark green chinos. Bump up this outfit by finishing off with beige athletic shoes.
Dark Green Chinos with Beige Athletic Shoes Casual Warm Weather Outfits
If you don't like being too serious with your outfits, go for a white long sleeve shirt and dark green chinos. Introduce a pair of beige athletic shoes to the mix to avoid looking too polished.
As you can see here, it doesn't take that much time for a man to look casually neat. Just opt for an olive check blazer and dark green chinos and you'll look incredibly stylish. Beige athletic shoes are the most effective way to punch up this look.