Alternate with another type of block, or maybe just a texture block.

I would put them on point .3 blocks top row 2 blocks middle row 3 blocks bottom row with sashing between blocks . use triangles on corners and sides .Congratulations on your win. Im sure whatever you make it will be beautiful.
Lorraine

love the colour mix ???? 2 vetical rows of 4 blocks rich blue betweenn ----3 alternating strips of ---- 1]plain faric trapunto type celtic pattern---2]flower garland applique 3] french braid blues+browns---no black ------just rich blues goldy browns ???yellows

How about cutting them apart, doing a square in a square with them, separate them by a black sashing, but, put them on point. If you do a 3 x 4 block on point, it should give you a decent size lap quilt and you could use white or purple for your setting squares. Would love to see pics of your final decision. BTW, the extra square could be a matching pillow or a block on the back.

Actually I've found the perfect thing to do with this! My friend likes it, so it's off to live at her place. The challenge is 4 squares only have ¼" separating them, and then there's a wider space down the middle.
Thanks for all the suggestions, I'll pass them along to her.

I'd cut them and put them on point. Fill in the gaps with 9 or 16 patches of various blues. Use white as the contrast.