The second photo shows the colors well. You were very creative with your backing. Congrats on your finished project. The binding color compliments the blocks well.
I went to a rug outlet to choose a Dining room rug. The salesperson told me the rug I liked had quiet colors, which were soft colors with the same value and therefore not a stark contrast. I see the same in your lovely quilt...soft and quiet colors...not screaming for your attention.(if that makes sense?)