I almost didn't reply because I thought I was going to look like a nerd, but then I remembered what this forum is for, so nevermind.
That's actually more complex than you would think. Remember those eye trick things? Like the one where you look at an American flag that is black, yellow, and... red? Then you look at a white sheet of paper and the correct American flag shows up because the cones that sense black, yellow, and red (or whatever) get worn out, and instead, you see their compliment. So if the world was tinted green, I think you'd actually start seeing a different color after a while. Maybe red?
I'd probably pick rose or yellow because they make you happier
I would definitely choose black. Everything would just look darker. My eyes would adjust and everything would not be a color that I may get tired of soon. But does black even count? Some people may make the argument that black is not a color but a tint. If this is so then i would pick blue. Everything always looks so cool in those blue tinted goggles. Sometimes I just like to wear them around my house if I'm in a particularly odd mood. So it really depends on if black should count as a color. Do you think it should?