"Color Appearance and the end of Hering’s Opponent-Colors Theory" basically confirms the opponent process as Utility-Based Coding starts from the exact same pri

"Color Appearance and the end of Hering’s Opponent-Colors Theory" basically confirms the opponent process as Utility-Based Coding starts from the exact same principle, and only disputes the way Opponent-Colors Theory attempts to explain some color perception phenomena. Understanding of opponent process dates far back before we discovered that this is actually what our brains are doing and there were some wacky attempts for justifying it involved before that indeed. The part we're talking about is a biological fact - you just have to keep in mind that words "blue", "green", "red" and "yellow" in this context are actually referring to complex spectral responses of LMS space (where "red" includes parts of "blue" etc.).