The back of an envelope, generally shown in white and sealed with a red heart. Represents a love letter or note, valentine, or affectionate greeting card. Commonly used to convey various feelings or messages of love and happiness.
Facebook’s envelope is pink, while Microsoft’s envelope was previously open.
Love Letter was approved as part of Unicode 6.0 in 2010 and added to Emoji 1.0 in 2015.
U+1F48C
? Love letter