The claim is that the greenish space makes dark objects appear more easily, and I know the “realism/fidelity” claims were clownishly wrong considering the space-fascist future features hand carts (that you have to buy with real world money!) and a star system loaded with 90s malls with hot dog stands, but something about making space itself a soupy greenish is… well… 
Back when I payed Eve I liked how different sectors of space had different hues. I had some good times in that game, even though I was a very small fish.
Every two years I reinstall and think, “maybe this time it’ll stick!” and then i get frustrated by spreadsheets and zero actual gameknowledge and quit