Coloring

With some help from here I can now dynamically change the coloring scheme of the data points:
 
Here we color things according to z,y,x values and the distance to Utopia point (that point in the right upper corner). Note we are flipping the colors for the z axis. The reason is that, the z axis represents Performance which we maximize. The other quantities are all minimized. See http://yetanothermathprogrammingconsultant.blogspot.com/2015/12/visualization-of-large-multi-criteria.html.