In literature, deep green is often employed to evoke the richness and vitality of nature. Writers use it to describe everything from the glossy foliage of an orange-tree, which immediately signals life and health [1], to the impenetrable tangle of a jungle, where deep green intensifies the mystery and depth of the wild [2]. It colors landscapes with a vivid naturalness—as seen in the depiction of grass bathed in purple shadows [3] or the prodigious oak whose deep green leaves stand out against a dramatic sky [4]. In these diverse settings, deep green not only serves as a simple descriptive hue but also deepens the reader's connection to the landscape, enveloping scenes in a feeling of nature’s enduring, vibrant elegance.