To me, the white is throwing the quilt off. What other color could you have used?

I am still playing in EQ7. I left all the centers blue and turned as if this were a NY Beauty block. There are so many interesting ways to play with these blocks. I can't wait to see what you decide to do. And how about the swirls moving across the quilt?

I like it just as it is.

I love the fabric choices!! The colors are great. I love the idea of putting the blocks on point and maybe a black border to finish it off. That should make the blocks pop a bit more.

I like the idea of having white sashing with blue cornerstones and testing various arrangements of the fans around the cornerstones. Something similar to this:

There is nothing wrong with your quilt blocks, besides a rather boring layout. There are many cool layouts for fan blocks... look here:
https://www.bing.com/search?form=MOZ...+quilt+layouts

Check out some of the links off that page, too.

Oh love that one-very pretty.

What doesn't work is that the color values are the same. As you look at the blocks, the fans all have the same value (dark). They run together along with the center "circle".
I would do as the others suggest and try some different layouts and see if that helps.
This is not a fan, but is a similar block. I didn't make this, but bought it in an estate sale. It might give you some idea of what I am talking about.
bkay

Try sashing with something dark and light blue cornerstones.

I like your fans! I played with your blocks in MS Paint. If you keep the squares the same, the existing color of the cornerstones worked nicely as a border. If you move your fans around into one of Barb's suggestions, I suspect that light blue will still work as a border.