On some designs, one color change may be the outline of the design. I did a cute polar fleece applique on polar fleece using a leaf design. I believe it was the last color change that we used. This color change outlined the leaf and also put a few vein lines in it. It turned out cute. So, we only used this last color changed, we did not stitch out the other colors. Just placed a piece of contrasting fleece on both sides of the base fleece, stitched out the leaf outline design and trimmed close to the outline stitching. Ended up with a applique on both sides so the fleece is reversible.