I am writing an article and the central results are summarized in a graph so I want it to be very beautiful and physically intuitive. It has 3 regions in which a certain quantity is conserved, partially conserved or not conserved so I want them to be respectively green, yellow/orange and red. The problem is that I can't find a good combination of colors... Maybe someone has done something of similar before and can give some suggestion.. I post here my figure:

Maybe it is not the right place where ask this question but I can not find a more appropriate Stack Exchange site to post it...