There must be opportunity for a graduate student or a writer to do an article or column or a blog or maybe even a book on the recent and current uses of the word “green”.
There are scores of such esoteric uses as horticulturists calling nitrogen green (Starbucks has a label on there rather brown coffee grinds that says they are “green” because of nitrogen conten.)Today I saw where someone had referred to dry red kidney beans as green (vs. the cooked red kidney beans in a can).
At Onelook the numbers down the left side go to 66 for green but only 58 for red and blue.