To be more specific, what I mean is that for example the blue dashes in '68 Plymouth Bs were the same color code, the upper door frames the same color code, etc. There's like 4 different shades of color on blue interiors & maroon interiors I've had. The plastic parts might even be 2 different colors. Sure, the actual shades or tones can vary from car to car, just as exterior colors would. As one can see from the different codes, it wasn't one blue for everything; but whether the subject car's exterior was U, Q, or E, that didn't change the blue interior color codes, which it appeared to me was part of the OP's inquiry.