A colour word that was cheap in 2010 and expensive by 2022

Among K-pop fans, the purple heart isn't a mood — it's practically a password. In November 2016 the BTS member V improvised the phrase "I purple you" at a fan event, explaining that purple, the last colour of the rainbow, meant he'd trust and love fans for a long time. The line stuck, the group's fandom adopted purple wholesale, and the emoji became shorthand for that entire world of devotion.

Outside that context it does quieter work. Purple has long carried associations with dignity and care, so the heart turns up in messages of support, sympathy, and admiration that stop short of romance — the affection you'd send a friend going through something hard. Some people simply like that it's warm without reading as flirtation.

One point of frequent confusion is worth clearing up: this is not the American military decoration. The U.S. Purple Heart is a physical medal awarded to wounded service members, and there's no dedicated emoji for it, so the coloured heart sometimes gets pressed into that role around Memorial Day or Veterans Day. If you mean the medal, spell it out — the emoji alone won't carry that meaning to most readers, who will see fandom or gentle affection first.