There are those who will disagree with me, but, in my opinion, neither the color of a coin, nor its "eye appeal" should effect the grade - at least not the assigned number. The amount of wear (on a circulated coin,) and the number of contact marks ( on an uncirculated coin,) should determine the grade. "Eye appeal" is subjective, and can not be defined quantitatively. Well, that may not be entirely true. You can assign a number to it, but that number will be arbitrary, and should not determine the grade. If anything, it should be listed separately, along with strike, luster, and any other descriptive term that the hobby decides is necessary to assign a value.