Okay just if you’re wondering, no it’s not a new color outside of the six or seven main colors but just an impossibly saturated green. The article explains that the retina has receptors for blue, green and red waves but that it’s impossible to see green without stimulating the blue and/or red one way or another. Their laser method manages to only stimulate the green receptors, so the shade of green that you see is impossible to be seen in any other way.