I agree with 2,3,1,4..and 6,5. From my end, 7 appears to be purple and yellow to me, but maybe you need the contrast?? 15 looks brownish-green to me and doesn't work.
I am no quilt expert at all, but I was a custom color matching specialist for Sherwin-Williams for years....back before they computers to do it! lol I believe this is where my love of color was born :)
I may have no idea what I am talking about, when it comes to the bargello quilts, so feel free to dismiss this opinion..lol