There’s plenty of fun to be had spritzing and sniffing perfumes in a store. But creating your own fragrance can be straight-up magical—not to mention completely personalized (no fear of scent-twinning ...

Tiffany & Co. has its robin’s egg blue. Christian Louboutin shoes have blood-red bottoms. Barbie sports a striking magenta that, thanks to a Herculean marketing blitz for the upcoming movie, now ...