The name ANSI is misleading.

ANSI simply stands for "American National Standards Institute", a non-profit body that was founded in 1918, which was meant to be a place where American industries could agree on standards which would then be used by all companies without variation. The theory was (and is) that by having all these disparate groups agree on, say, the size of a washer, or the width of a rail , then there's less infighting over forcing the customer base/world to have to choose a specific company's standard, and the focus is on making the American industry as a whole the dominant factor in domestic and foreign markets.

There is a graphics standard in DOS on IBM Computers called "ANSI" (which is actually ANSI standard X3.64-1979 or ISO standard DP-6429 and ECMA-35) which was implemented in the early 1980's. It allowed a certain set of escape sequences to be included in files that would produce color and cursor movement on the screen, and was used to great benefit on DOS machines for some time, especially some BBS menus and welcome screens. Towards the early 1990's, an entire ANSI "Scene" rose up where people tried to outdo each other producing elaborate ANSI images and files.