These cards here are using our Two Step Background stamps. They are in our Spring/Summer catalog on page 92. I also used our Remarkable Wreath stamp set on page 88 of our current catalog.
I just took one of the background stamps and stamped it, then took the other stamp that is the second stamp and got a coordinating color and stamped it over the first one. Very cool, very easy and now you can have whatever color cards you want! The colors combinations are endless! If you have this stamp set...get it out and start creating!