Re: Black or brown backpack straps with DZ packabe?
For me, it would be black. But that's what I mainly wear.
I actually think either of the two would work, so I'd go with the color you have more of in your wardrobe.
Also, the BFF came in DZ, so you could put an ISO out there for the backpack straps from one.
Some ladies only carry with the messenger strap and wouldn't mind parting with theirs.
I'd post in the ISO here and also on the JJB B/S/T page on FB.