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 😅