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Installing Nissan side moldings in another Frontier color would break up the 'white monotony' while also being functional against (some/most) door dings.
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Tell me what you think.

You asked. If it was my white truck, I could see going w/ black, or gray, or silver or night armor/gun metallic...maybe even blue.
Now, if you were to do other red accents (IE brake calipers/tow hooks/etc), then maybe it might work. Again, JMO. Above all else, do what you want to your truck. It is yours to personalize! Opinions are like exhaust pipes...........