TikTok reacts to viral ‘ rainbow kiss ’ trend with instant regret Rainbow Heart Smooch : Signifying glee and variance, the colorful smooch holds deeper significances. This charming fusion of colors and emotional gesture conveys love from the heart. Whether it stands for hope, dignity, or solidarity, the meaning behind the colorful smooch stirs souls. Embrace the vibrancy and express the passion with a delightful colorful smooch.