Swatch books and Crafting

I don't know how many of you have heard of swatchbooks but certain paper companies make small books with samples of their paper so that when you are crafting you can match up the paper to your project and buy the exact right hue that you want. I just bought the Bazill swatchbook for their Burlap line and it is awesome, it even includes the RGB code so you can enter on your Imagine machine if you have one or in Photoshop if you want to match exactly to your cardstock. How awesome is that?