Ok, I agree that if you have enough fabric add a border of the dark blue that we all thought was black.
And then use either one color or little bits of all of the colors you have left over for the binding. I would not lean toward a print. It might distract from your blocks. I also think that leaving it as is and using a color for the binding would look good too. Not being wishy-washy, but you do have choices. Just as us and away we go with lots of suggestions.