Really, my theory is not disproven but slightly less compelling in a small way as green lights do exist in outer space!

I am personally interested in the environments we walk or ride into and fashion to some degree.   Color testing has happened and the results are hard to put into words.  In some cases people may want a colored environment that is more stimulating. Green can obviously stimulate a lot more than purple or orange.  I assume that these two colors are the unusual ones.  The blue, red, green and sorta yellow are more common and feel more natural.  A black theatre or a huge white cafe are no less odd or surreal even.  Does all this info mean that people need to get experimental.  I would suggest some caution because humans color their homes and cities in similar ways across the world.  Is it wise to tamper then?