The term "sickly yellow" in literature is often deployed as a visual symbol that connotes decay, unease, or an abnormal state. Authors use it to describe both living features and external environments. For instance, when a character's complexion becomes a sickly yellow, it often signals physical deterioration or emotional distress ([1], [2]), while its application to light or landscapes—such as the eerie movement of sickly yellow lamps across deserted houses or a horizon washed in an ominous hue ([3], [4])—serves to imbue scenes with an atmosphere of disquiet and forewarning. This consistent use of the color not only paints a vivid picture for the reader but also reinforces themes of corruption or impending doom throughout the narrative.