Noego, you just sent me on an interesting Google hunt. You're right!
The main wavelength of light emitted by the sun is actually green. (It is almost a
Link blackbody and when you heat something that absorbs all photons put into it to 5800°K, it turns green, just like a heated stove burner turns red.)
We see it as white because
Link our eye chemicals find green and red hard to distinguish (as opposed to blue, the other color -- so blue and red stars are easy to see).
On purple stars, I played so much Galactic Civ and if I had ever bumped into an awesome planet in a sector where I didn't know there was a star, I would have been so surprised I would have remembered it. It would have been a big temptation to save and reload, though, so I'm glad they didn't do it that way. I never even scouted planets in advance, thought that was cheating (though I do prefer the way they do it now where influence shows right at the start).