Borders on...thank you for your input-y'all were right, as usual!
Maybe not being able to locate more green fabric was fate....most of you said use the red for borders.....and I love it! I probably would have gone with the white to feel safe, but I was short about 12", so I decided the forces of the universe were talking to me! It is 55" square-kind of a wonky size, but it will fit on my kitchen table.
Thanks for sharing your words of wisdom!