Maybe my reply is too late, but here goes.
Something light, like the current gray. This fabric can easily be dyed so a light color allows us to change the color as we chose, which gives us an even more custom piece of gear. I like the gray, but may try dying it blue or black. That way i can make a few packs with the same material but they don’t have to all look the same. We could easily dye it to the “breen” you present but you can offer it in a more neutral color that should appeal to more people.
-Tim
