I know some of y’all are put off by the bright colors of the Ruffwear and Wolfpacks dogpacks, but the look of the pack is least important part. The position and placement of the panniers and how it fits your dog are more important.
Having a functional and safe piece of sport equipment comes first and a huge majority of people seriously packing their dogs (as in not doing it for the instagram LEWK) want their dogs to be visible when hiking (the best times to pack for me are during deer hunting season in fall and turkey hunting season in spring, so safety is #1). That is why bright colors are most popular.
If you seriously cannot deal with bright colors Non-Stop’s pack comes in black/gray but is very expensive. Wolfpacks also have a forest green color option that is not an assault to the eyes. Some older Ruffwear models come in gray so if you can find them on a buy/sell group that is your best bet.
Do not be pulled in by the aesthetic wonderland that is one Tigris or Wolf Republic. They look great on Instagram, but these packs do not fit dogs in a way that is safe to carry weight bigger than a roll of poop bags. Also avoid Groundbird, the appeal of full customization is real, but their packs ALSO do not sit on the proper area to carry weight.