Border on the Purple Afghan

The afghan that I recently finished (the entry of Oct 14) was the 3rd in a series "It's All about the Purple". That's a frequent quote at the dance studio where I work in the office. So I started making a purple afghan each year, the afghan is donated to the studio and is raffled off. This year I tried to get the afghan finished in time to display at the end of year recital. With having other responsibilites related to the recital, I ended up rushing at the last minute. I put a simple border of two rows of double crochet in pale plum, got some photos for posters, and had the afghan displayed at the recital. I wasn't exactly thrilled with that border and planned to re-do it. It just took a while to decide what I wanted to do.
The afghan is made of squares with a flower in the center, then sage colored v-stitches to resemble leaves, then several rounds in different shades of purples, or a variegated with purple. So, I pulled out the simple border. Actually I let daughter #2 pull out while I wound the yarn into a ball! I started with a round of sage in the v-stitch, then two rounds of singles in pale plum. Then planned to put a reverse single crochet around, but as I was worked I kept thinking "something's not right". The reverse single should have created a raised border, reminds me of pie crust edge. What I was getting was a flat stitch on the side of the last row of singles. While working in the final ends I realized what was "wrong" with my reverse single, I had done a reverse slip stitch! This was done in the variegated yarn, and I really love the look. It's sort of a picture frame effect.

But, my point is I tried to make the border "echo" the body of the afghan.