SHALOM RABBI PLEASE EXPLAIN WHY THE COLORING OF TEHELET FROM VEGETABLE SURSES IS NOT KOSHER.AND WHO HAD THE AUTHORITY TO CANSEL IT’S USE...ACC. MEDRACH YACHUMA, SHLACH 15,...17:5 NO MAN CAN CHANGE THE TORA. AND WHY THE ORTODOX USE ONLY WHITE? THE TORA DOESN’T SAY THE USE OF THE COLOR...PLEASE ANSWER ME IN A SERIUS MANNER; I DONT TAKE SIMPLE ANSWERS SHALOM. CALEB.

In the later generations there have been a few identifications of the Tchelet for which the tradition was lost. One by the Admor of Rodzin z"l, another by Rav Herzog z"l and of late a third has been identified. The identifications were made through scientific findings and not based upon tradition. The leading Rabbis of previous generations did not accept their identifications rather they were rejected due to the great doubts around the issue. Therefore nobody has changed the Torah rather according to the rules of Jewish law the dyes assumed to be Tchelet were not accepted. However, if you were taught by your Rabbi to use Tchelet you should follow what you were told.