Hi and welcome to the Board from Southern California! What are the dimensions of your YBR top? Keeping in min, your backing fabric is about 40" usable, and you should have a few inches extra on all four sides when you baste it, you may be able to just use the length opened up, and have enough to cut strips for your borders. You might have to make the borders a bit narrower, but without knowing the size of your top, can't help too much. I would say, for your binding, though, take all the left over scraps of blues and cut your 2 1/2" strips in random lengths, and randomly sew them together, end to end, and make your binding a scrappy one. That will look great! Very nice quilts you have made!!