ברכות א:ב פירוש: ברטנורא והסבר באנגלית

בין תכלת ללבן – Between the threads of azure and the threads of white in the ritual fringes (of the Tallit. The Torah – Numbers 15:38 – commands that a “cord of blue” be attached to the fringe at each corner; these two colors – blue/azure and white – are sufficiently distinct from each other that one can with relative ease distinguish between people and objects). Another explanation: The sheering of wool whose color is azure/blue and (yet) there are places (in the wool) where the color was not absorbed [properly] and which remained white.

Introduction Today’s mishnah proceeds to discuss when the morning Shema is recited. The Torah says that it should be recited “when you get up,” so the debate in our mishnah is essentially over the meaning of this phrase.

בין תכלת לכרתי – The color of the azure/blue is close to/resembles the color “leek-green” which is called “PORUSH” in a foreign language.