This pairing of a charcoal blazer and jeans is hard proof that a pared down ensemble can still be really smart. This combo is most probably what you're looking for as a gent in his 30s.
Charcoal Blazer with Jeans Outfits For Men In Their 30s
You'll be amazed at how extremely easy it is for any gent to pull together this casually classic look. Just a charcoal blazer and jeans. The whole ensemble comes together if you add tan suede desert boots to this getup. This ensemble is most probably what you're looking for as a young gent.
Try teaming a charcoal blazer with jeans to pull together a neat and classy ensemble. Want to go easy with footwear? Add a pair of navy leather boat shoes to the equation for the day. So if you're after a modern and age-appropriate pairing, this one fits the bill.
Team a charcoal blazer with a burgundy wool blazer to be the definition of manly elegance. As you can see here this getup is something you can totally wear as a 30-year-old man.
This pairing of a charcoal blazer and jeans looks considered and makes you look instantly cooler. Dark brown suede desert boots pull the look together. Certainly a fail-safe option if we're talking fashion for maturing gentlemen.