I guess I hadn’t thought about dirt and sun-fade. I didn’t get the exact selection of colors purchased and I have a mixed flock so similar colors shouldn’t be too much of an issue.
These are the ones I purchased because I knew I’d want many colors:
Electriduct Nylon Cable Ties - 4" Self-Locking Zip Ties Multi Color: (Blue, Red, Green, Yellow, Fuschia, Orange, Gray, Purple) - 500 Pieces https://www.amazon.com/dp/B009OLZJ4I/?tag=backy-20