Another theory: their target customer might have a lower credit score.
This goes back to a conversation I had with a friend who handled auto loans for one of the big used car companies. He told me yellow car = lower credit score, it's almost always true. Why? Well people with high credit scores tend to think ahead before making decisions, where people with low credit scores tend to be more impulsive. In most cases selling a yellow car in the future will be harder than selling a silver, white, red, black, or blue car. The resale value also might be less because there is less demand. Conclusion: yellow car = impulsiveness > thinking ahead = likely to have bad credit.
Why do I think this would apply to Dodge? Well, going back about a decade, FIAT/Chrysler/Dodge/Ram/Jeep(all the same company) have consistently ranked at or near the bottom for reliability. If you buy a car with the intention of driving it for 5 years or more, you probably aren't buying a Dodge. Buying a Dodge = impulsiveness > thinking ahead = likely to have bad credit.