personally i dont believe it is techeiles.
just a feeling
techeiles is supposed to remind us of the Kisai HaCovod
much of the Mishkan and the Bigdei Kehunah were composed of Techeles.
i cant believe it was of this color some call techeles today, it just isnt beautiful enough. techeles should be of a color that uplifts the heart and produces Simcha. the “techeles” today is so weak and “blah”
obviously i am not suggesting what the Halachah is based on this
just my feeling