A blue suit and a light blue dress shirt are among the key elements of any gent's wardrobe. You could perhaps get a little creative with footwear and tone down this ensemble by slipping into dark brown suede desert boots. Keep this outfit in mind come spring, and we promise you'll save time racking your brain for an ensemble on more than one morning. Scouting for dressing ideas for 40-year-old guys? This ensemble is great inspiration.