I agree that none of your pictured choices really are quite right.
My choice would be a print with little yellow flowers in it. Doesn't have to be only yellow flowers, just some in amongst the others.
That would give added color as well as tie it all together. Plus the small print would be in keeping with the traditional look of your blocks.
I've had a really cute one that was a lightish green background with lots of different color flowers. Don't imagine that exact one is still available, but you can probably find something similar.