Not with that pattern you couldn't, I don't think. If you have a decent amount of each fabric, try laying out a big unfolded piece of a solid and stacking the other fabrics (folded small) on it in a row. Rinse and repeat with the other fabrics, take photos of the lot, put all the photos up together, stand back and ponder. And show us, of course.
Though looking at the photo again, I wouldn't try the blue for the sashing (or either blue, if you use both). The white you took out might possibly work, as it's a different context now. The red looks like a strong contender, especially since it will pick out the bits of red in the patterned fabrics. Possibly the celery, though that one doesn't look terribly greenish in photos which makes it harder to judge. Is there any particular colour which you're drawn to more than the others?