Interesting! I'm not sure it would work for me and how I like to work. It looks like I would need to sort every sheet in every paper pack into colors or themes, since a given paper pack can contain several different "predominant" colors, and then decide where it goes: a sheet of flowered paper with equal amounts of turquoise and pink could go in one of the spring or summer month sections, or it could go in the rainbow section, but then would it go under pink or should it go under turquoise? Agh! More decisions! I'm not good with that.
But it's an interesting system, and I can see how it might work for some folks.