If your hubby is doing the work himself, you can get it to look exactly how you want it to look. My shelves are walnut and came from a company on the internet. But I got them to match my walnut shelves on the other side of the room (normal bookshelves). I wanted them to go with the rest of the room and not stick out too much as cat shelves. I have used velcro to attach non-slip pads to the shelves, so if I ever sell or rent the place out, I can take off the non-slip pads, take off the velcro and the shelves will just be regular shelves.
However you do it, I'm sure your kitties will love them!