Perfume experts! Does anyone know a perfume that smells similar to Bobbi brown face base?

[Vohgue]

Apparently it has a grapefruit and geranium scent. I would love to buy it as a perfume.

That's a tricky one! There are fragrances that contain geranium and also grapefruit, but you'd have to do a lot of digging around on Fragrantica or base notes. Off the top of my head you could try Molton Brown Geranium Nefertum, although instead of grapefruit it has bergamot, which is still a refreshing citrussy note.