Lay a piece of LT Sage Green between the square blocks. I know it sounds different because you dont have green except the green with the roses.
I try to put something completely different in the space and use the same for backing.It could have a small tiny print in it like wite has tiny prints in them.Hearts,flowers.Its hard to explain it.I have lots of white with tiny prints that I use as extra when I need something different.Ive seen it in all shades of color.