“Eleven lines prior to stating “gufo domeh l’yam” the gemara quotes R’ Meir “Techeiles Domeh L’yam”.”
Are you arguing with the Chazon Nachum (????? ???? ?’ ?’. ???’ ???’ ??’ ??”? ??? ?????? ???? ?????? ????”? ?????? ???????) who learns it’s body can be green?
Also see ??”? ??”? ??? that blue is ???? ????. So it’s not so shver if it’s ???? to both.
Also see
???? ????? (??????) ?’ ?
“??? ???? ?????? ?????? ????? ??????? ??????? ?????..”
Also keep in mind that the “eleven lines prior” is not part of the argument. The gemara which brings different braisos for different reasons. The inyan of ???? ????? came from ??? ????? ?? ???. Now why should we cut out part of a Braisa?
In addition the 1st braisa says
???? ??? ?’ ???? ???? ?? ????? ???? ??? ???? ???????
which is obviously a much higher ???? of ????. It has to be different than everything else in that sense.