This combination of a dark purple suit and a white dress shirt is a solid bet when you need to look truly dapper. A pair of black leather brogues introduces a more casual aesthetic to the ensemble. You can take inspiration from getups like this if you've passed the big 3-0 and you want to take a more serious approach to your personal style.
For a look that's classic and wow-worthy, choose a dark purple suit and a light violet gingham dress shirt. To infuse a more casual aesthetic into your look, complement this getup with a pair of black leather brogues. As a 30-something guy, you probably want to start dressing with more elegance. In this case, ensembles like this become a great source of inspo.