I ended up tweaking my Vim syntax highlighting earlier this week (after my first post), to be more in line with what Ben had posted. Here’s what I’ve come up with so far (with the disclaimer that all of this code is internal and wasn’t written with the expectation that it would ever be seen by anyone else) (and I’m also still fairly new at writing Go and Rust):

And some Rust, Go, and HTML:

These are certainly more soothing to my eyes, which was something I didn’t realize I needed. While these aren’t perfect in the least — with enough variation between languages to look almost like entirely different color themes, though I think I see that as a feature and not a bug — I’m happy with the tweaks for now and plan to stick with them.