Since the floral is your favorite, I would use it for the focus fabric (4 outer corners that stay the original size). Then I would use the the red or the orange for the center fabric (to be cut into smaller squares). For the 'arms' (middle fabric on each side to be cut in half lengthwise) I would pick the aqua. This will give you good color balance as well as go nicely together.
Let us see pictures when you get it all together! Will be gorgeous!