I would be willing to bet you money that orange/white/green is the most popular colorway requested on Nike By You.
And that's not just "love of alma mater" talking.
Think about it.
Other common colorways are VERY available in "official" wide-release. Nobody can act like "red/white/black" is a hard-to-find Nike colorway.
Then, you consider weird combos (teal/pink/purple) and you have to think that those are VERY rare requests.
Furthermore, school colorway requests will be more common for non-Nike schools...and don't forget the LOOOOONG history that UM had with Nike...
And then think about how many times you've seen people rocking UM colors on Nikes (and more than just the recent Dunks)...
I'm telling you, orange/white/green is one of the top, if not THE #1, requested colorways on Nike By You.