From time to time, SGC has worked with card companies like UD for baseball, and they worked with Topps hockey. At least I think it was Topps, but I am certain it was a hockey issue. They use a blue label for slabs included in packs, or as part of a mail in. I actually think the blue looks good.
Matthew T. Natale
Completed 1977 Topps Baseball SGC Graded Set, Average Grade 92.89