That's a great question! I've had the same concern with my own outdoor bins over the years. Through trial and error and some research, I've found that darker, earth-toned colors typically hold up much better against sun exposure than brighter shades.
Darker colors like forest green, dark brown, black, and deep gray tend to resist fading the best. These colors contain more pigment and are better at absorbing UV rays rather than reflecting them, which helps prevent that washed-out look over time. Earth tones work particularly well because they're designed to mimic natural elements that withstand outdoor conditions.
Lighter colors, especially bright reds, blues, and yellows, tend to fade more quickly when constantly exposed to direct sunlight. The UV rays break down the pigments in these brighter colors faster. If you prefer lighter shades, tan and beige generally perform better than white or pastel colors.
The material of your bin also plays a role. High-quality plastics with UV inhibitors will maintain their color longer regardless of the shade. When shopping for a new outdoor trash can, look for products specifically labeled as "UV-resistant" or "weather-resistant" for the best color retention.
No matter what color you choose, placing your bin in a partially shaded area when possible can significantly extend the vibrancy of its color. A simple rotation between sun and shade exposure can make a noticeable difference in how well your bin's color holds up season after season.