Wow, had a hard time titling this question. My terminology is so limited.
In any case, I’d like to know the key name, or whatever it’s called, for the thin vertical stripe of color that illuminates along the far-left of the gutter whenever you’re in a line that’s been changed since you last opened the file.
That stripe, in my Monokai theme, is sort of a flourescent green, and I’d like to be able to fiddle with its color, but I don’t know how to name the thing. Any help appreciated.