Greg Cox wrote:
To be honest, I'm not sure the uniform colors were all that codified back in that day. Charlene Masters was an engineer in "The Alternative Factor," but she wore blue.
(I just went back and forth with a copyeditor on that one. The copyeditor changed her uniform to red, to fit her duties on the ship, and I changed it back to blue to match what we saw on TV.)
I wonder if educational background would factor into uniform colors. Perhaps her background was in a scientific field related to dilithium crystals, leading her to be sorted into the blueshirts, but would also naturally lead her to be in engineering.