I still like #1. Depending on the size needed could you not add another block of colors then the border, or a border like the inner border around your color blocks? The #4 white area seems, to me, as if you ran out of colors and had to use the white material. Believe me I could be wrong, it is just the way my brain sees it. Either way, your work is great to look at and your combination of colors really WORKS.
Good thoughts,
Connie