There are TONS of colors of craws in CO from olive to orange to blue. Sometimes, you will find a trigger color, but matching the hatch exactly has never been my most productive way with craws. Orange belly's have worked great, Olive bodies tend to be my favorite (with tubes too, same idea), I have also worked with blue on the claws. But here's the interesting thing...I have chartreuse crawfish baits that work outstanding.
In my opinion, presentation has much more to do with success than the exact color. I think color choice is important based on water staining/depth/sunlight more than what the color of the actual food source is. Good luck.