this maybe sounds stupid but....

I have used a purple toothpaste, or it might have been white with purple flecks, and I think it might have been marketed as a whitening toothpaste, I can't really remember. In theory yes, it would make the teeth look whiter, no idea if it works that well though. I don't remember any difference.

Using purple lipstick actually highlights how yellow your teeth are, it is the contrast of the opposing colour. Like when hair is too yellow to tone, the toned areas make the darker parts look even more yellow.

Using purple lipstick actually highlights how yellow your teeth are, it is the contrast of the opposing colour. Like when hair is too yellow to tone, the toned areas make the darker parts look even more yellow.

I was thinking the same thing! Orange based lipsticks work better with yellow teeth... which is why I only have orange based lipsticks lol

strange i actually read that a purple/blueish based lipsticks works better to make your teeth look white :O http://sharonthemakeupartist.com/whiter-teeth-from-lipstick/

I totally disagree that her teeth look better with the pink, it looks about the same. If you've got yellow teeth like me you really see the difference.