I have a Too Faced foundation which I swear is yellow, but according to their own site is pink based. Born This Way in Vanilla, and when I apply its very yellow looking but strangely give it a few seconds and it does seem to blend perfectly into my skin. Its an American thing for in many brands to be ultra yellow based. I think QVC buyers just go with the lightest two shades and middle then dark when ordering from the brands. They don't think about tones etc at all.
Foundation is a thing you really need to get your shades correct or you can look ill when wearing. I know I am suppose to be pink based but many times I suit the warm tone better in certain brands. As I said all very personal which tones and shades which are right for you. I like Charlotte Tilbury in this case, no store near you order from her site, she includes two extra foundation samples. You try these before opening the full size, that way you can return free and get the correct shade.