I recently received a large influx of pauper related cards, allowing me to expand into what the color themes of this cube actually are. I was also able to eliminate the colorless section of the cube, as that had largely seemed to fill in gaps in what the colors should be able to do, but could not due to the card pool I owned.
Thus, I tightened up the identities of this cube's color scheme and multi-color pairings, which will now live in the cube description.

The land base did not change--that may eventually be a change that is made. The cube currently sits at 370 cards, which is a bit awkward.
I did a separate post for each color shift that occurred--although I did not explain the choices.