> But it also might not do much of anything at all, if it's then mapped to our existing opponent process [1] that is fundamentally based on red vs. green and b

> But it also might not do much of anything at all, if it's then mapped to our existing opponent process [1] that is fundamentally based on red vs. green and blue vs. yellow. In other words, it would just be a redundant or ignored sensory input to our conceptual color processing. A click away: https://imjal.github.io/theory-of-tetrachromacy/ https://imjal.github.io/theory-of-tetrachromacy/