George, 3rd Earl Cowper (1738-1789) Anton Raphael Mengs (1728-1779)

The picture has something of this: people, portrait, wear, man, boy, child, son, jacket, facial expression, retro, youth, face, outerwear, popularity, profile, cravat.
Perhaps it’s a close up of a painting of a person wearing a blue coat and a red and white scarf and wearing.