How do I go about filling the 'gaps' along the edge in a OBW? I don't want the obw blocks to form a straight edge along the quilt but want to fill the spaces with a dark blue fabric. Any suggestions on how to do that? Or should I just use half obw blocks to make the edge straight and forget about trying to fill in with the blue fabric?

I'd appreciate any suggestions. (I might move the blocks around some more, but suggestions about placement would be welcome, too.)

Very Pretty!

You can fill it in with half hexs just made of blue fabric. Then cut down. It looks like it is assembled very similar to traditional tumbling blocks. I simply made extra blocks of my background fabric and trimmed down.

Or you could applique it to the dark blue background

Love the fabric you have used, plus adding the boxes. Wonder how it would look if you did half boxes. Also the idea to do the half hexes in the solid blue would be nice.

looking pretty, do you have a picture of the fabric before you cut it up so we can see what it looks like, thanks

Thank you for the suggestions. I thought about the half hexes, but then I wondered if there was a better or more 'elegant' way of doing it. :D
Here is the original fabric--'Age of Aquarius'-looking, isn't it??? The blocks were made from scraps I had.

Beautiful

I just don't know what to tell you, but I know whatever you do, It's gonna be beautiful bc it already is!

Marcia - I did a "jagged" one with similar block configuration
http://www.quiltingboard.com/t-81428-1.htm
If you look at the second picture you will see I filled the sides with either whole, or half, plain black hexagons until there was a straight edge to add a border, which is also black.
Deal with the sides first to get your straight edges.
If you have one of the One Block Wonder books, it will show you in there how to deal with top and bottom points.
Basically before you join the seams between the horizontal strips of triangles, you cut a width of border fabric (if your triangles were cut at 3-3/4ins, you cut 3-1/2in width, cut it with about an inch longer than your border requirement width. Cut two (one for the top and one for the bottom of each row). Then at one end of each piece and matching the angle of the particular strip, cut a 60deg angle one end of the piece to match the joined strip of triangles. So in other words you will have the horizontal strip with the border already attached top and bottom. Then you join all your strips together, you can trim to exact width required.
Then you can add borders to the sides in the normal way.
Hope this helps.