Sap green has often been celebrated in literature as a quintessential green hue that both defines and enlivens natural imagery and artistic instruction. In many texts it appears in lists of pigments alongside other vibrant colors, emphasizing its distinctive yellow-green quality ([1], [2]), while other works describe its use in the delicate rendering of living subjects—for example, a creature’s shield is depicted as sap green, lending it a lifelike, almost otherworldly quality ([3]). Beyond depicting objects, sap green also marks the color of foliage; leaves and stalks are frequently painted in this hue, sometimes with subtle washes or shadings that add depth and realism to botanical descriptions ([4], [5], [6]). The color’s presence in these varied literary contexts—both in practical pigment recipes and in vivid natural portrayals—underscores its enduring appeal as a tool for both artistic creation and eloquent description.