Patronus is a pearly sheer polish with a soft blue to purple shift and blue micro-flakies. Much like its namesake this polish glows blue/white in the dark.
(Our original pigment for this polish has been discontinued but we have found a near exact match. The polish may be slightly more opaque but otherwise is next to impossible to tell apart. All the same, this polish will now be labeled as Patronus 2.0. Please see the updated and comparison swatches kindly done for us by jens_ten.)
I have no affiliation with Harry Potter or any other person/company that may own rights to this amazing series besides being a huge fan.