Mesorah on Shade of Blue, How Many Strings

Wearing techeiles [when it is available] is a חיוב גמור , so if there’s a machlokes how to do the mitzva, we need to pasken. We are not exempt from keeping the Mitzvos. Just like we need to pasken medical sha’alos which are new and can’t simply be ignored. But to simply violate the mitzva according to all shittos?! Chas Veshalom!

Additionally, the subject has been dealt with clearly and satisfactorily by the Rabbonim who hold of it.

The shade is not critical as we have no Gemaras discussing the shade as we have by other halachos that depend on color such as dam niddah and tzoraas. It is also clear from the Radvaz (שו”ת רדב”ז הרדב”ז ח”ה סי’ אלף תכ”א )מ”ח( ) that the shade may vary.