Dark overshirt, cream tee and denim

An open overshirt creates a strong frame without needing a formal jacket. Charcoal around an ecru tee makes the central line immediately visible, and faded denim stops the outfit from feeling too crisp. The black boots repeat the outer layer's depth, connecting the top and bottom across the lighter jeans. This is a relatively quiet route into grunge because the effect comes from relaxed cuts and worn-looking surfaces rather than a specific print. You can make it work with a plain shirt jacket from your wardrobe. Focus on keeping its texture different from the tee, then let the denim provide the remaining change in surface.