WriterAlexis Color charge and quark flavor are not related, quarks are not jelly beans.
I would reckon any such tractor beam, if it is ever invented, will not so much be based on the field around individual charges, but around clever manipulation of those fields. Much like our bodies are held together by electromagnetism, but that does not mean we automatically attract or repel each other. Well, sometimes we do, but usually not due to electromagnetic forces between us, but due to electromagnetic forces within each of us.