Thanks ever so much for all your comments about which version you liked the best. They made me look at my border decisions again and again. Blue was chosen for the side setting triangles and that helped to set the blocks apart from whatever the border turned out to be.
Here, the 9-patch blocks were lined up ... but I just found that they were still a bit too busy for me.
BTW ... these are not the true colours of my blocks but I just couldn't get a good photo so my photos were enhanced and they came out a tad too bright. So, I tried large rectangular scrappy blocks. Nope, too large. Ignore the section on the right where there are no blue triangles (those blocks have not been sewn together yet).