This is definitive proof that a blue denim shirt and light blue skinny jeans are awesome when matched together in a bold casual outfit. If you wish to immediately step up this outfit with one item, why not add a pair of blue suede derby shoes to the equation? As we all know, the key to getting through the hottest time of year is choosing cool combos like this one. Rest assured this getup is something you can totally wear as a 30-something Millennial man.