Color coded rim or plain black, why ?

One more thing, used to have a 70 E body (V car) and a other fellow not too far from me ended up buying a 71 E body after seeing my car (He saw the light as he drove a mustang at the time) well he upped me one step more, even though my E body, was a 4 speed, electric Windows, rear window louder, trunk spoiler, shaker car ... Got one with a Hemi... Even then (79-80) you knew the Hemi was a special car.... But getting away from the topic, at one point he had put on the car dog dish hubcaps and said it was original. Until here I agree but he also had them color coded.
Now is that possible ?
From what I have just learned, it is NOT, maybe early,70 build but by 71 it was impossible from what you guys say that an E body car would have color coded dog dish hub caps.
This is just to settle a dilemma between me and another fanatic Mopar lover.