The term "yellow heart" commonly refers to a symbol of affection, warmth, and friendship, often used in digital communication, such as texts or social media. It can represent happiness, positivity, and a cheerful disposition. This emoji (💛) signifies a caring feeling that is not as passionate as a red heart but still expresses fondness and emotional support.
The combination of "yellow," which often symbolizes brightness, happiness, and warmth, with "heart," a traditional symbol of affection and love, creates the term "yellow heart." The usage of colored hearts in digital communication took off with the rise of emojis in the early 2000s, particularly through mobile texting and social media platforms.