The strands are awesome shoes and you can definitely wear it casually. The strands go well with dark denims, odd trousers, solid colored trousers etc...
You definitely can't go wrong with the Strands though since it is a highly popular shoe. It's probably my favorite shoe along with the 5 aves.
This is very good to hear. I fell in love with the Strands after seeing them and reading all the incredible reviews.
To clarify, does this apply to the black and walnut equally? I assume the walnut is more natural for a casual look but I would really like to get the black ones as I already have some pretty solid brown dress shoes.