Ich hab mal Benefit direkt angeschrieben, falls es jemanden interessiert, hier die Antwort zu den Farben:

Thank you for your interest in Benefit Cosmetics.

Just getting back to you about the "Hello flawless!" The petal is going to be
the closest shade to champagne, without the pink undertones. The ivory is going
to not have the pink undertones, but it is a little bit lighter than the
champagne. I think if you're trying to stray from the pink, you would like the
petal, because it's closer to the same shade that you're used to.

I hope this helps. Thank you for shopping with Benefit Cosmetics.