First of all, I love the blocks. The bright colors are great. I think all the colors match just fine. The only thing I can see that might not match is on my screen the block on the right appears to have a tone on tone white background. If you like the blue, change the right block to have a solid background. If the blue bothers you, move the tone on tone to the center and make a new green one for the left.
It's going to be pretty regardless of you decision.