I've seen those blocks together referred to as Inside Outside quilts
I know them as Rainy Day quilts . In another state I've heard them called Potato Chip quilts. The implication is that they were very easy. And they are.
Also, I've done them with much busier fabric. The idea is to find 2 fabrics you might never put together, and then make the whole quilt from them. ;-) And have a little bit of fun with the borders.
I made more than a dozen of these around 7 years ago (they're kinda addicting).