When I first made blankets for the family (pre-quilting), my Mom gave me a ton of this stuff. It was great to use for backings. So long as the fabric was soft, it made warm and comfy blankies using a cotton top and batting. Not so comfy fabric works better on the bottoms of chair cushions for the couch in the basement. Knits on the bottom tend to keep the cushions from sliding around too.
I like everything but the greens. I didn't like them in the 70s. Don't like 'em any better now that they've come back in style.
If your pieces aren't large enough for the whole back, don't hesitate to incorporate some other cottons. For instance, use the plaid right down the center back. Not wide enough? Buy some black and make a 1.5 inch strip on both sides. Then get a red or blue that goes with that plaid in cotton to finish the edges. It looks planned. The advantage of using this stuff is that, like flannel, it tends not to slide off the bed or lap.