Probably have in Asia, where all the electronic gadgets including this LED shower head come from the culture produces a different mapping between colors and temperatures than we here in Europe. Because this country is nunmal blue for "cold" and red for "hot", and it imposed itself on, the third primary color of light, namely green, for "warm" to take.
One can go even further and use for more precise temperature resolution mixed colors: cyan for lukewarm water, or yellow (= mixture of green and red light) for the area where it starts to get hot.
