Square Envelopes - MIDNIGHT BLACK - 9.5 in SQUARE EnvelopesLUX Paper is proud to show off its line of fierce, bold LUX Colors. LUX Midnight Black will never be the wrong decision for your V.I.P announcement. Midnight Black is a striking choice, but remember, printing options are limited to a select choice of ink colors; metallic gold, metallic silver or white (or check out our wide selection of labels)!