Reply To: Techeiles 🔵❎🐌☑️🐟

The Mechaber brings down a shitta that the tzitzis have to be the same color as the tallis and says that the medakdekim are noheg to do so. It’s a machlokes acharonim if the reason is min knaf or zeh keli v’anveihu (based on machlokes rishonim). Regardless of the underlying svara, the Rema paskens against this shitta. Besides for the fact that it’s clear from the gemara that there’s no problem of having kala ilan as the white strings in terms of the validity of the tzitzis. Also the Rambam says this din by the chutei lavan and there’s a shtickle mashmaos from a Teshuva of the Rambam that the issue of min knaf is only on the first winding (i.e. if the first winding is the color of the beged then there’s no problem). The chiyuv to wear Techeiles is d’oraisa. The din of having the tzitzis the same color as the beged which we don’t pasken like, is only d’rabanan according to the tzad of zeh keli v’anveihu. So even if we grant that the Murex Trunculus is a safek, the svara to wear it is a safek d’oraisa, while the svara to not wear it is a din which doesn’t apply to the techeiles strings and even if it does we don’t pasken like it and even if we pasken like it it might only be a d’rabanan. Ayin S”A siman 595 and M”B sham that a safek d’oraisa beats a vadai d’rabanan, Kol Shekain a safek d’rabanan.