It's really all about what you don't do—as in, don't put two identical shades of jean fabric next to each other. EVER. (This rule can be broken only within the highest sanctums of style mastery.) The easiest (and, in my opinion, best) way to do it is to play up polar opposites: black jeans-light denim shirt, raw selvedge washed trucker...you get it. It says, "I did this on purpose." And make sure everything fits. You can get away with damn near anything if it fits you correctly.