[ALR-bishop]

Color variants like this exist in all Topps sets. I am not aware of any of them getting listed as variations in SCD. Not sure about Beckett of the rRgistry. SCD does list the 1982 blackless set where a color is missing from 396 of the cards in the set. But the blueless cards from the same set are not listed. Sometimes color differences may just be part of the printing process with some color running too low or being too prominent. Sometimes it maybe sun fading. But if someone would start trying to list such differences in color in all Topps sets, the list would be enormous. You can find examples on ebay all the time and they do not get much interest