What effect does mixing red and green coolant in a Dodge Durango?

It depends on the brands of coolant. It may do no more harm than being an ugly color, or it could sludge up and restrict all flow.
It depends on the brands of coolant. It may do no more harm than being an ugly color, or it could sludge up and restrict all flow.
It depends on the brands of coolant. It may do no more harm than being an ugly color, or it could sludge up and restrict all flow.

It depends on the brands of coolant. It may do no more harm than being an ugly color, or it could sludge up and restrict all flow.