That's an interesting question with a surprisingly consistent answer worldwide. In most business districts, you'll predominantly find trash bins in dark green or black.
The reasons behind this choice are both practical and psychological. Dark colors, particularly deep greens and blacks, are excellent at concealing everyday wear and tear, scuff marks, and minor stains that are inevitable in high-traffic urban areas. This means they maintain a cleaner, more professional appearance for longer periods between cleanings, which is crucial for a district's image.
From a psychological standpoint, these colors are often subconsciously associated with discretion, efficiency, and environmental responsibility. Dark green, in particular, subtly evokes nature and recycling, aligning with many cities' sustainability branding. Black conveys formality and blends seamlessly with the concrete, steel, and glass of modern cityscapes, avoiding visual clutter.
While you might see occasional stainless steel bins for a sleek, modern look near upscale offices, or specific colors for recycling streams (like blue for paper), the workhorse general waste bin in commercial cores is overwhelmingly dark-toned. It’s a quiet design decision that prioritizes low-maintenance practicality and a cohesive urban aesthetic.