In some literary works, "tropical rain forest" is employed not just as a description of an ecosystem but also as a distinct color—a rich, deep green that evokes the wild, untamed vibrancy of nature. In examples such as [1] and [2], the term appears as a self-contained designation, suggesting that it functions like the name of a specific pigment reminiscent of the lush canopy found in the natural world. Similarly, its use in [3], [4], [5], and [6] reinforces the idea that this is more than just a geographical term; it is a color imbued with connotations of mystery and vitality, capturing in a single phrase the complex spectrum of hues present in a dense, thriving jungle.