Cute blocks and I vote for the blue. If you are thinking the blue river will run into the blue background? Bonus! I would add a couple of more alligators on the blue background sashing as if they are swimming around the other blocks.
If you think it makes it too much blue , I'd use green sashing as you have a lot of that in the blocks and maybe add a couple of more monkeys in the sashing.
Last edited by Tartan; 11-10-2015 at 08:02 AM.