Here's what I did! (As usual, clicking on the photo will take you to a larger image.)
First, I made the blanket. I used a simple pattern with three colors, then chained one around the entire blanket, then a row of double crochet, then a shell stitch.
Then I took a bunch of pictures of the blanket, found the most usable one and cropped the image and made a graphic using Paint Shop Pro and printed it out one 12" x 12" cardstock. And to keep it pretty on the inside, I flipped the paper over and printed the other side with a checkerboard pattern, using colors I took from the blanket graphic.
Here they are against a plain white sheet of cardstock for comparison.
I used the large bag from the Happy Holidays Kit from SVGCuts for this bag.
And the blanket out of the bag. I wrapped the blanket in green tissue paper for gifting.
I think they both turned out nicely, I'll be doing this again.