No.4 Loving heart emojis in different colors represent different meanings.
第四，表情符號中不同顏色的“愛心”代表的含義也不同。

Do not send a "Red Heart"emoji to anyone except your lover. A red heart represents love, and passion occasionally; a blue one means respect; a green one stands for friendship while a purple one means desire or lust. Orange means admiration. When you send a pink heart to someone, it means you two will fall in love or have a dubious relationship.
“紅心”只適合發給愛人。它表達的是愛，有時也會代表激情；“藍心”寓意尊重；“綠心”象征友誼；“紫心”代表欲望或貪戀；“橘黃色心”則是欽佩的含義；當你給別人發送一個“粉紅色的心”時，這意味著你們兩人將陷入一段曖昧的戀情。