In literature, the term "rouge" is remarkably versatile. It appears as a cosmetic touch that enhances facial beauty or signals affectation, as when a character adds a bit of extra rouge before dinner [1] or uses it to accentuate a delicate complexion [2]. In contrast, it is also used to denote specific shades or coded designations that contribute to a text’s rich palette, seen in listings of colors [3], [4], [5]. Meanwhile, the word carries geographical and historical weight, marking places such as Baton Rouge [6], [7], [8] or contributing to heraldic symbolism [9], and even influencing iconic titles like Le Rouge et le Noir [10].