Faithful RSGo reader Kat (not the picture-demanding one, the other one) points out that on Wikipedia's Crayola crayon page, they indicate a fun fact:
Several colors have been renamed through the years, beginning with the 1958 renaming of "Prussian blue" to "midnight blue."
Nineteen fifty-eight. That is twenty-eight years before the birth of the Olsen twins. It is, however, about simultaneous with the heyday of hostess pants. Just sayin'.