Gack!! Your ring is gorgeous!!
I don't ever trust the color I see in the car because of the windshield tint that goes across the top. It's bluish green and depending on how the sun is shining through it reflects...I think I even see some slight green/blue color on your hands in those photos. That might explain why some people only see it in the car.
Only twice have I seen a funky color on my RB Amora moissy. Once was when the sky was a really strange color...not the normal kind of overcast but the kind where people look out the window and say "Look how weird the sky looks!!" You know, like it might be the end of the world or something. LOL
My moissy turned a light buttery color. I kinda liked it but I wouldn't want that color all the time.
The other time I don't count. The stone was a weird green/golden color and I was thinking...ACK, what's wrong with my stone!! I took off my glasses to get a better look and it was all fine. It was just my polarized sunglasses.