Tekhelet in Judaism is the holiest color of Judaism. It is a blue or violet dye.
Like their non-Jewish neighbors, Jews of the Middle East painted their doorposts, and other parts of their homes with tekhelet (a blue-violet color) dyes; have ornamented their children with tekhelet ribbons and markings; and have used this color in protective amulets.[1] Tekhelet has been considered especially effective against the evil eye.[citation needed]
In the Torah, the Israelites were commanded to make tassels, tzitzit, on the corners of their garments, and to weave within these tassles with Tekhelet."[2] The oral law requires that this thread be made from a dye extracted from a sea creature known in rabbinic literature as the Ḥilazon.[3] Staring at this color aids in meditation, bringing us a glimpse of the "pavement of sapphire, like the very sky for purity," which is a likeness of the Throne of God.[4] Many items in the Mishkan, the portable sanctuary in the wilderness, such as the menorah, many of the vessels, and the Ark of the Covenant, were covered with blue-violet cloth when transported from place to place.[5]
It represents equilibrium, since its hue suggests a shade midway between white and black, day and evening.[6]
The Flag of Israel has two blue stripes and a blue Star of David against a white background. Because of its association with the State of Israel, blue became very popular in contemporary Jewish design.[7] Modern tallitot, especially those used by Religious Zionist Jews, often have blue stripes on a white background instead of black stripes common in Haredi communities.