“Rashi knew of the word ???? and that there are definitely times that ???? means green, therefore it would be odd for him to describe Techeiles as ???? if he meant blue.”
The answer is ???? wasn’t a used word and Rashi uses a simple and understood Hebrew. Rishonim who say ???? is blue don’t use the word ???? (besides Rambam who explains himself).
????? ???? ?? ????”? ??”? ??”? ?????
already says Rashi means blue.
See ??? ????? ??’ ? ??? ?
????? ????? ?? ????? ??? “??? ???? ???? ????? ??”?
“????? ????? ??? ?????
w/o using the word ????.