The "v1.08" version in this article is almost certainly referring to the , which was built for the latest version of the game at the time (v1.08). While it wasn't as universally complete as the simpler mod, it added "massive amounts of color and detail" to a significant portion of the game's sprites, and contained content and fixes not found in other versions. Some sources also mention this version of the mod allowed players to swap out backgrounds, music, and boss fights, giving it a comprehensive overhaul feel. The creator even teased upcoming features, noting that "Sans in not in color but we are working on him as I type this!" for a future update, showing the project was in active development.
Note: Always back up your save files and original game directory before installing any modifications. Prerequisites Undertale Colored Sprite Mod 1.08