Butterfly on a Neem Tree at Fair Share

I am so grateful whenever there is a volunteer at Fair Share who has their camera when I don't.  Sally took this awesome shot of this butterfly that I spotted on our Neem Tree tonight.  I have no idea what kind of butterfly it is.  Any ideas?  It looked like it was painted with silver.  Looking forward to having Sally back soon.  She is starting a new group at Daytona State College called Real Food On Campus.  You can check out their Facebook page for upcoming events here.