Each color heart means something different. For example, the yellow heart is for friendship, the red heart is for true and long-lasting love, and the purple heart means physical attraction. A green heart is for nature and St Patrick's Day, while the black heart emoji stands for sadness or a dark sense of humor.

What does the ? mean?

The Blue Heart emoji ? depicts a classic representation of heart, colored blue. It can be used to express love, support, admiration, happiness, and excitement—particularly toward various things that have some relation to the color blue, from the Smurfs to Duke University to autism awareness.

What does ? emoji mean?

The yellow heart emoji, ?, can convey love, just like any other heart symbol or emoji, but its yellow color often gets used to show liking and friendship (as opposed to romantic love). Its color also works with expressions of happiness—and with all things yellow, from sports team colors to dresses.