I love this quilt so much! I have always hated pastels, my whole life, even as a child. When getting your colors done became a thing in the 80's I found out I'm a winter, and that is no doubt why. Also very miffed that I was stuck with poopy old pink, because "blue is for boys." So if you really, really think it needs to be bigger, then go for it, but the design really seems finished to me. I think a turquoise and black zigzag would distract from the design progression you have going on here, but you are **very clearly** a much better graphic artist than I am, and I'm not modest at all, lol. So, I trust your design chops and think you will achieve the best solution. If you decide to do the zigzag, i definitely want to see it! (The horrible competitor within is thinking it might be awful, but the realist is reaching over to give her a smack and a sharply worded lecture on humility. Lol, I really keep those little shoulder people busy some days.)