With sky blue you can see the countries that buy their arms from the United States. With red the ones that buy their arms from Russia, and with yellow the ones that buy their arms from China. With dark blue you can see the countries that buy their arms from USA, Russia and China. With sky blue-red you can see the ones that buy arms from USA and Russia, with sky blue-yellow the ones that buy from USA and China, and with red-yellow the ones that buy from Russia and China. See maps 1,2 and 3.
Map 1
Map 2
Map 3
“This map shows where the world's 3 biggest arms exporters are sending their weapons”, March 2015
http://www.businessinsider.com/where-the-world-buys-its-weapons-2015-3