Tekhelet in the context of "Tzitzit"

The Star of David (Hebrew: מָגֵן דָּוִד, romanized: Māḡēn Dāvīḏ, [maˈɡen daˈvid] , lit. 'Shield of David') is a symbol generally recognized as representing both Jewish identity and the Jewish people's ethnic religion, Judaism. Its shape is that of a hexagram: the compound of two equilateral triangles.

A derivation of the Seal of Solomon was used for decorative and mystical purposes by Kabbalistic Jews and Muslims. The hexagram appears occasionally in Jewish contexts since antiquity as a decorative motif, such as a stone bearing a hexagram from the arch of the 3rd–4th century Khirbet Shura synagogue. A hexagram found in a religious context can be seen in the Leningrad Codex, a manuscript of the Hebrew Bible from 11th-century Cairo.

The flag of Israel was officially adopted on 28 October 1948. It is a white banner with three blue (tekhelet) symbols: a pair of horizontal tallit-like stripes above and below a centred Star of David. Relevant Israeli legislation describes the flag's dimensions as 160 cm (63 in) by 220 cm (87 in), thereby fixing the proportion to a ratio of 8:11. But variants can be found at a wide range of proportions, with 2:3 also common.

The symbols' colour is generically described as "dark sky-blue" and may differ from flag to flag, ranging from pure blue (sometimes shaded almost as dark as navy blue) to hues about 75% toward pure cyan and shades as light as very light blue. An early version of the flag was displayed at a procession marking the third anniversary of the founding of Rishon LeZion in 1885. A similar version was designed for the Zionist movement in 1891. The highly distinctive Star of David, which recalls the legendary Seal of Solomon, has been prominent as a widely recognized Jewish symbol since the 17th century and was formally endorsed by the First Zionist Congress in 1897.