The main color is the color you see the most while Secondary is just an accent. In the Inflow for example, the Secondary color is the middle pocket. 
No I can't show the results because most of them haven't been discovered.
One thing I've learned is that very rarely, if ever, you will match 2 leathers together and get a bad result. I once made a red and blue + orange thread passport holder and, to my suprise, it looked good.
So what would match the jungle green best? If you don't want a contrast with the inside from the outside, this olive green you see on this Inflow might be good. Perfect? Probably not. But that dosen't mean it wouldn't look good.
But maybe we could explore some calfskin for the inside. It's not in my usual choices but I've worked a bit with this one and I love it. Ultra soft.

It's a very hard decision. There's no bad choice. White or black would probably look good too. Heck, I bet if you were to go with yellow it would look good too.
I hope I'm not making this even more difficult for you 😅
I Don't have the answer because I have never seen and touched these particular colors myself.

I gotcha! But just so I understand... The Cordovan crossover... Using the Max as my example:
The shell is the white on the outside.
The pueblo primary is white
The pueblo secondary is orange
And the thread is orange.
Did I get that correct?
Awesome! Thank you sir! I'll ponder colors and get my order in in the next week or so. What's your normal lead time?
It really depends on my current work load. Orders from last month had about 1 month lead time. But if you make your order next week I'm thinking 2-3 weeks. (I need 1 week just to receive materials).
Great! I look forward to minting my own and see how it comes out!
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