Antonyms for the phrase "left the cold" could include "embraced the warmth," "basked in the sunlight," "soaked up the heat," or "revelled in the warmth." These phrases imply a sense of comfort and contentment, contrasting with the discomfort and unpleasantness associated with being in the cold. Other possible antonyms might include phrases like "luxuriated in the hot tub," "enjoyed a cozy fire," or "snuggled under a warm blanket." All of these alternatives suggest a degree of relaxation and enjoyment, highlighting the stark contrast between the cold and the warmth.