I wonder how important relatively speaking the individual differences (outside the extremes of color-blindness) are, compared to the fact that the customers are simply not sitting in such 'white rooms'.
well the whole point of trying to produce color corrected monitors was to avoid the whole process of printing things out and looking at them in white rooms as desktop publishing started to become a thing - high end publishers were (are?) very sensitive to their color fidelity, compelling color is very much part of what draws in their readers
