A denim shirt and chinos are a good pairing to have in your wardrobe. For a dressier aesthetic, why not complete your outfit with brown suede loafers?
Denim Shirt with Chinos Outfits
This combination of a denim shirt and chinos is well-executed and yet it looks casual and ready for anything. If you wish to easily play down your outfit with one single piece, complement your look with a pair of tan leather work boots.