Every quilt is different. I know that sounds like a cop-out, but, it is true. Scrappy quilts have absolutely everything and look great, but so do black and whites and other 2 color quilts. I think your 2 colors look very nice together and I don't think it would be boring. The block is very interesting and the blue has lots of tiny colors. When you complete the top, if you think it needs something more, add multiple borders. Perhaps the blues with a tiny green, maybe even flange the green. But, whatever you decide to do, please post your finished quilt.