The blue heart emoji first came out in 2010 and was added to Emoji 1.0 in 2015. If you're unsure about how to use a heart emoji, we have this handy guide . When should you use the blue heart emoji?

It is also a key colour heart to use if you are trying to be a nice person but don't want to give off any mixed messages.. The blue heart emoji first came out in 2010 and was added to Emoji 1.0 in ...