It is a stunning design, love the color fade from one to the next.
If you don't already have fabrics in your stash, go to www.thousandsofbolts.com and use their 'color picker' to help you find the exact shades of blue that you need. Add them to your cart to see your entire selection together and you should be able to tell if they would work in your design.
I just read about this the other day here on the message board and was blown away by this feature AND the low prices of the fabric.
See if that helps you find the fabrics you want.
I wish all fabric sites had this feature. I saw one, might be Connecting threads, that also had a design wall so you could see your selection, but not sure if it was there or not.
Good luck, can't wait to see your quilt in progress!
warm quilt hugs, sue in CA