I kinda hate to do this to you, but it looks a lot like the paint color Chief Brody came up with for the Jaws blazer.
If it is, then its a good news/bad news situation.
The good news, is that the color name is in this thread......
https://ck5.com/forums/threads/ryokens-guide-to-rust-treatment-and-bodywork-101.283048/
The bad news, is that its in that thread......
The thread is huge. It all started when the Chief asked if Rust Bullet was any good.
344 pages, over 6800 posts.
Here is a link to some finished pictures.
https://ck5.com/forums/threads/ryokens-guide-to-rust-treatment-and-bodywork-101.283048/page-312
That will not help you with the paint color, but you can maybe see if it looks like the right one. It was hard to identify, took the Chief a while.