I like the direction of #40. Are you able to use the dark blue from #21. Also are you able to make the cube look more like the cube in this link? Where the 3rd side is on the bottom? So M on Left, D on right and A on bottom.
http://3dprint.com/wp-content/uploads/2015/03/3ds.jpg Feel free to be creative and submit some other 3 dimensional designs and color schemes. thanks.