For an ensemble that's pared-down but can be flaunted in a myriad of different ways, consider wearing a white long sleeve shirt and navy jeans. If you feel like dressing up a bit, opt for dark brown suede loafers. As you imagine, this is a cool option when spring arrives. A great ensemble to make you a well-dressed gentleman in his 50s, rather than just a gentleman in his 50s.
If you're looking for a relaxed casual but also stylish outfit, team a white long sleeve shirt with navy jeans. You could perhaps get a bit experimental on the shoe front and introduce a pair of tan suede loafers to the equation. If you're on a mission for a kick-ass look that transitions easily into spring, this is it. This is a nice but also age-appropriate ensemble for a 50-something gentleman.