ANSI X3.64 plus almost 30* years of oddball extensions. For a long time, "ANSI codes" or even just "ANSI" was almost synonymous with that (increasingly loosely defined) standard, at least in the context of terminal graphics.

Now I'm not sure that still holds, but I decided the post title didn't need to be even longer and more arcane :)

* Edit: That should be 40, actually. Time flies.