So humans vision is much more sensitive to green than other colors. it’s why camera sensors are 50% green 25% red 25% blue. Which makes sense as being able to detect small differences in plant cover is useful in both detecting predators and prey.

https://en.m.wikipedia.org/wiki/Bayer_filter

If humans had more flat color detection range we woulda actually be able to see that the sky is purple and not blue.