You are correct. I just got an email back from BASF paint specialist saying: “Hello James,
It looks like the POR 358-9-3 corresponds with VW L96M, Marathonblau Met.”
Plus the 2nd pic here is a dead ringer for same color imo.
https://www.instagram.com/p/CkCZavrpaU5/?img_index=1&igsh=MXNkamRtZ21ub2cwZA==